diff --git a/NEW_RELEASE_NOTES.md b/NEW_RELEASE_NOTES.md
index 77a7acc5f46..4a1a9c7fa7e 100644
--- a/NEW_RELEASE_NOTES.md
+++ b/NEW_RELEASE_NOTES.md
@@ -7,5 +7,3 @@ for next branch cut* header.
 appropriate header in [RELEASE_NOTES.md](./RELEASE_NOTES.md).
 
 ## Release notes for next branch cut
-
-- engine: Add experimental APIs `Engine::builder::paused()` and `Engine::setPaused()`
diff --git a/README.md b/README.md
index a1dc91cdc6b..f2e6856085d 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'com.google.android.filament:filament-android:1.51.1'
+    implementation 'com.google.android.filament:filament-android:1.51.2'
 }
 ```
 
@@ -51,7 +51,7 @@ Here are all the libraries available in the group `com.google.android.filament`:
 iOS projects can use CocoaPods to install the latest release:
 
 ```shell
-pod 'Filament', '~> 1.51.1'
+pod 'Filament', '~> 1.51.2'
 ```
 
 ### Snapshots
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index ba94019fceb..d60e6d45843 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -7,6 +7,10 @@ A new header is inserted each time a *tag* is created.
 Instead, if you are authoring a PR for the main branch, add your release note to
 [NEW_RELEASE_NOTES.md](./NEW_RELEASE_NOTES.md).
 
+## v1.51.2
+
+- engine: Add experimental APIs `Engine::builder::paused()` and `Engine::setPaused()`
+
 ## v1.51.1
 
 
diff --git a/android/filament-android/src/main/cpp/RenderableManager.cpp b/android/filament-android/src/main/cpp/RenderableManager.cpp
index 2713dffa0b4..4e586179baa 100644
--- a/android/filament-android/src/main/cpp/RenderableManager.cpp
+++ b/android/filament-android/src/main/cpp/RenderableManager.cpp
@@ -104,6 +104,14 @@ Java_com_google_android_filament_RenderableManager_nBuilderGeometry__JIIJJIIII(J
             (size_t) count);
 }
 
+extern "C"
+JNIEXPORT void JNICALL
+Java_com_google_android_filament_RenderableManager_nBuilderGeometryType(JNIEnv*, jclass,
+        jlong nativeBuilder, int type) {
+    RenderableManager::Builder *builder = (RenderableManager::Builder *) nativeBuilder;
+    builder->geometryType((RenderableManager::Builder::GeometryType)type);
+}
+
 extern "C"
 JNIEXPORT void JNICALL
 Java_com_google_android_filament_RenderableManager_nBuilderMaterial(JNIEnv*, jclass,
diff --git a/android/filament-android/src/main/java/com/google/android/filament/Engine.java b/android/filament-android/src/main/java/com/google/android/filament/Engine.java
index 68f10986548..97301df9806 100644
--- a/android/filament-android/src/main/java/com/google/android/filament/Engine.java
+++ b/android/filament-android/src/main/java/com/google/android/filament/Engine.java
@@ -243,9 +243,11 @@ public Builder featureLevel(FeatureLevel featureLevel) {
         /**
          * Sets the initial paused state of the rendering thread.
          *
+         * <p>Warning: This is an experimental API. See {@link Engine#setPaused(boolean)} for
+         * caveats.
+         *
          * @param paused Whether to start the rendering thread paused.
          * @return A reference to this Builder for chaining calls.
-         * @warning Experimental.
          */
         public Builder paused(boolean paused) {
             nSetBuilderPaused(mNativeBuilder, paused);
@@ -1209,7 +1211,16 @@ public void flush() {
 
     /**
      * Pause or resume the rendering thread.
-     * @warning Experimental.
+     *
+     * <p>Warning: This is an experimental API. In particular, note the following caveats.
+     *
+     * <ul><li>
+     * Buffer callbacks will never be called as long as the rendering thread is paused.
+     * Do not rely on a buffer callback to unpause the thread.
+     * </li><li>
+     * While the rendering thread is paused, rendering commands will continue to be queued until the
+     * buffer limit is reached. When the limit is reached, the program will abort.
+     * </li></ul>
      */
     public void setPaused(boolean paused) {
         nSetPaused(getNativeObject(), paused);
diff --git a/android/filament-android/src/main/java/com/google/android/filament/RenderableManager.java b/android/filament-android/src/main/java/com/google/android/filament/RenderableManager.java
index a3c8f1ff1c2..f7a6319d7a8 100644
--- a/android/filament-android/src/main/java/com/google/android/filament/RenderableManager.java
+++ b/android/filament-android/src/main/java/com/google/android/filament/RenderableManager.java
@@ -175,6 +175,32 @@ public Builder geometry(@IntRange(from = 0) int index, @NonNull PrimitiveType ty
             return this;
         }
 
+        /**
+         * Type of geometry for a Renderable
+         */
+        public enum GeometryType {
+            /** dynamic gemoetry has no restriction */
+            DYNAMIC,
+            /** bounds and world space transform are immutable */
+            STATIC_BOUNDS,
+            /** skinning/morphing not allowed and Vertex/IndexBuffer immutables */
+            STATIC
+        }
+
+        /**
+         * Specify whether this renderable has static bounds. In this context his means that
+         * the renderable's bounding box cannot change and that the renderable's transform is
+         * assumed immutable. Changing the renderable's transform via the TransformManager
+         * can lead to corrupted graphics. Note that skinning and morphing are not forbidden.
+         * Disabled by default.
+         * @param enable whether this renderable has static bounds. false by default.
+         */
+        @NonNull
+        public Builder geometryType(GeometryType type) {
+            nBuilderGeometryType(mNativeBuilder, type.ordinal());
+            return this;
+        }
+
         /**
          * Binds a material instance to the specified primitive.
          *
@@ -964,6 +990,7 @@ public long getNativeObject() {
     private static native void nBuilderGeometry(long nativeBuilder, int index, int value, long nativeVertexBuffer, long nativeIndexBuffer);
     private static native void nBuilderGeometry(long nativeBuilder, int index, int value, long nativeVertexBuffer, long nativeIndexBuffer, int offset, int count);
     private static native void nBuilderGeometry(long nativeBuilder, int index, int value, long nativeVertexBuffer, long nativeIndexBuffer, int offset, int minIndex, int maxIndex, int count);
+    private static native void nBuilderGeometryType(long nativeBuilder, int type);
     private static native void nBuilderMaterial(long nativeBuilder, int index, long nativeMaterialInstance);
     private static native void nBuilderBlendOrder(long nativeBuilder, int index, int blendOrder);
     private static native void nBuilderGlobalBlendOrderEnabled(long nativeBuilder, int index, boolean enabled);
diff --git a/android/gradle.properties b/android/gradle.properties
index 685dd260796..c677c8262ab 100644
--- a/android/gradle.properties
+++ b/android/gradle.properties
@@ -1,5 +1,5 @@
 GROUP=com.google.android.filament
-VERSION_NAME=1.51.1
+VERSION_NAME=1.51.2
 
 POM_DESCRIPTION=Real-time physically based rendering engine for Android.
 
diff --git a/build.sh b/build.sh
index d9a778c7ba2..56562cc1c6c 100755
--- a/build.sh
+++ b/build.sh
@@ -516,7 +516,7 @@ function build_android {
             if [[ "${BUILD_ANDROID_SAMPLES}" == "true" ]]; then
                 for sample in ${ANDROID_SAMPLES}; do
                     echo "Installing out/${sample}-debug.apk"
-                    cp samples/${sample}/build/outputs/apk/debug/${sample}-debug-unsigned.apk \
+                    cp samples/${sample}/build/outputs/apk/debug/${sample}-debug.apk \
                         ../out/${sample}-debug.apk
                 done
             fi
diff --git a/filament/backend/include/backend/Program.h b/filament/backend/include/backend/Program.h
index 97deb6c586b..fe1c4a9b6e8 100644
--- a/filament/backend/include/backend/Program.h
+++ b/filament/backend/include/backend/Program.h
@@ -116,6 +116,8 @@ class Program {
 
     Program& cacheId(uint64_t cacheId) noexcept;
 
+    Program& multiview(bool multiview) noexcept;
+
     ShaderSource const& getShadersSource() const noexcept { return mShadersSource; }
     ShaderSource& getShadersSource() noexcept { return mShadersSource; }
 
@@ -143,6 +145,8 @@ class Program {
 
     uint64_t getCacheId() const noexcept { return mCacheId; }
 
+    bool isMultiview() const noexcept { return mMultiview; }
+
     CompilerPriorityQueue getPriorityQueue() const noexcept { return mPriorityQueue; }
 
 private:
@@ -158,6 +162,11 @@ class Program {
     utils::FixedCapacityVector<std::pair<utils::CString, uint8_t>> mAttributes;
     std::array<UniformInfo, Program::UNIFORM_BINDING_COUNT> mBindingUniformInfo;
     CompilerPriorityQueue mPriorityQueue = CompilerPriorityQueue::HIGH;
+    // Indicates the current engine was initialized with multiview stereo, and the variant for this
+    // program contains STE flag. This will be referred later for the OpenGL shader compiler to
+    // determine whether shader code replacement for the num_views should be performed.
+    // This variable could be promoted as a more generic variable later if other similar needs occur.
+    bool mMultiview = false;
 };
 
 } // namespace filament::backend
diff --git a/filament/backend/src/CommandBufferQueue.cpp b/filament/backend/src/CommandBufferQueue.cpp
index 9de07ed0e27..b721ce0c50f 100644
--- a/filament/backend/src/CommandBufferQueue.cpp
+++ b/filament/backend/src/CommandBufferQueue.cpp
@@ -58,6 +58,7 @@ void CommandBufferQueue::requestExit() {
 }
 
 void CommandBufferQueue::setPaused(bool paused) {
+    std::lock_guard<utils::Mutex> const lock(mLock);
     if (paused) {
         mPaused = true;
     } else {
@@ -125,6 +126,9 @@ void CommandBufferQueue::flush() noexcept {
 #endif
 
         SYSTRACE_NAME("waiting: CircularBuffer::flush()");
+        ASSERT_POSTCONDITION(!mPaused,
+                "CommandStream is full, but since the rendering thread is paused, "
+                "the buffer cannot flush and we will deadlock. Instead, abort.");
         mCondition.wait(lock, [this, requiredSize]() -> bool {
             // TODO: on macOS, we need to call pumpEvents from time to time
             return mFreeSpace >= requiredSize;
diff --git a/filament/backend/src/Program.cpp b/filament/backend/src/Program.cpp
index 1bae22d97d0..dc92e8c2a26 100644
--- a/filament/backend/src/Program.cpp
+++ b/filament/backend/src/Program.cpp
@@ -91,6 +91,11 @@ Program& Program::cacheId(uint64_t cacheId) noexcept {
     return *this;
 }
 
+Program& Program::multiview(bool multiview) noexcept {
+    mMultiview = multiview;
+    return *this;
+}
+
 io::ostream& operator<<(io::ostream& out, const Program& builder) {
     out << "Program{";
     builder.mLogger(out);
diff --git a/filament/backend/src/opengl/OpenGLDriver.cpp b/filament/backend/src/opengl/OpenGLDriver.cpp
index e4668e33306..196d1bd2e66 100644
--- a/filament/backend/src/opengl/OpenGLDriver.cpp
+++ b/filament/backend/src/opengl/OpenGLDriver.cpp
@@ -2472,7 +2472,9 @@ void OpenGLDriver::setTextureData(GLTexture* t, uint32_t level,
     size_t const stride = p.stride ? p.stride : width;
     size_t const bpp = PBD::computeDataSize(p.format, p.type, 1, 1, 1);
     size_t const bpr = PBD::computeDataSize(p.format, p.type, stride, 1, p.alignment);
-    void const* const buffer = static_cast<char const*>(p.buffer) + p.left * bpp + bpr * p.top;
+    size_t const bpl = bpr * height; // TODO: PBD should have a "layer stride"
+    void const* const buffer = static_cast<char const*>(p.buffer)
+            + bpp* p.left + bpr * p.top + bpl * 0; // TODO: PBD should have a p.depth
 
     switch (t->target) {
         case SamplerType::SAMPLER_EXTERNAL:
diff --git a/filament/backend/src/opengl/ShaderCompilerService.cpp b/filament/backend/src/opengl/ShaderCompilerService.cpp
index 3c1f57f8329..5b9397ddd4b 100644
--- a/filament/backend/src/opengl/ShaderCompilerService.cpp
+++ b/filament/backend/src/opengl/ShaderCompilerService.cpp
@@ -30,6 +30,7 @@
 #include <utils/Log.h>
 #include <utils/Systrace.h>
 
+#include <cctype>
 #include <chrono>
 #include <string>
 #include <string_view>
@@ -264,6 +265,7 @@ ShaderCompilerService::program_token_t ShaderCompilerService::createProgram(
                     compileShaders(gl,
                             std::move(program.getShadersSource()),
                             program.getSpecializationConstants(),
+                            program.isMultiview(),
                             shaders,
                             token->shaderSourceCode);
 
@@ -299,6 +301,7 @@ ShaderCompilerService::program_token_t ShaderCompilerService::createProgram(
         compileShaders(gl,
                 std::move(program.getShadersSource()),
                 program.getSpecializationConstants(),
+                program.isMultiview(),
                 token->gl.shaders,
                 token->shaderSourceCode);
 
@@ -501,6 +504,7 @@ GLuint ShaderCompilerService::initialize(program_token_t& token) noexcept {
 void ShaderCompilerService::compileShaders(OpenGLContext& context,
         Program::ShaderSource shadersSource,
         utils::FixedCapacityVector<Program::SpecializationConstant> const& specializationConstants,
+        bool multiview,
         std::array<GLuint, Program::SHADER_TYPE_COUNT>& outShaders,
         UTILS_UNUSED_IN_RELEASE std::array<CString, Program::SHADER_TYPE_COUNT>& outShaderSourceCode) noexcept {
 
@@ -514,8 +518,16 @@ void ShaderCompilerService::compileShaders(OpenGLContext& context,
     };
 
     std::string specializationConstantString;
+    int32_t numViews = 2;
     for (auto const& sc : specializationConstants) {
         appendSpecConstantString(specializationConstantString, sc);
+        if (sc.id == 8) {
+            // This constant must match
+            // ReservedSpecializationConstants::CONFIG_STEREO_EYE_COUNT
+            // which we can't use here because it's defined in EngineEnums.h.
+            // (we're breaking layering here, but it's for the good cause).
+            numViews = std::get<int32_t>(sc.value);
+        }
     }
     if (!specializationConstantString.empty()) {
         specializationConstantString += '\n';
@@ -544,17 +556,23 @@ void ShaderCompilerService::compileShaders(OpenGLContext& context,
 
         if (UTILS_LIKELY(!shadersSource[i].empty())) {
             Program::ShaderBlob& shader = shadersSource[i];
+            char* shader_src = reinterpret_cast<char*>(shader.data());
+            size_t shader_len = shader.size();
 
             // remove GOOGLE_cpp_style_line_directive
-            std::string_view const source = process_GOOGLE_cpp_style_line_directive(context,
-                    reinterpret_cast<char*>(shader.data()), shader.size());
+            process_GOOGLE_cpp_style_line_directive(context, shader_src, shader_len);
+
+            // replace the value of layout(num_views = X) for multiview extension
+            if (multiview && stage == ShaderStage::VERTEX) {
+                process_OVR_multiview2(context, numViews, shader_src, shader_len);
+            }
 
             // add support for ARB_shading_language_packing if needed
             auto const packingFunctions = process_ARB_shading_language_packing(context);
 
             // split shader source, so we can insert the specialization constants and the packing
             // functions
-            auto const [prolog, body] = splitShaderSource(source);
+            auto const [prolog, body] = splitShaderSource({ shader_src, shader_len });
 
             const std::array<const char*, 4> sources = {
                     prolog.data(),
@@ -577,7 +595,7 @@ void ShaderCompilerService::compileShaders(OpenGLContext& context,
 #ifndef NDEBUG
             // for debugging we return the original shader source (without the modifications we
             // made here), otherwise the line numbers wouldn't match.
-            outShaderSourceCode[i] = { source.data(), source.length() };
+            outShaderSourceCode[i] = { shader_src, shader_len };
 #endif
 
             outShaders[i] = shaderId;
@@ -586,15 +604,59 @@ void ShaderCompilerService::compileShaders(OpenGLContext& context,
 }
 
 // If usages of the Google-style line directive are present, remove them, as some
-// drivers don't allow the quotation marks. This happens in-place.
-std::string_view ShaderCompilerService::process_GOOGLE_cpp_style_line_directive(OpenGLContext& context,
+// drivers don't allow the quotation marks. This source modification happens in-place.
+void ShaderCompilerService::process_GOOGLE_cpp_style_line_directive(OpenGLContext& context,
         char* source, size_t len) noexcept {
     if (!context.ext.GOOGLE_cpp_style_line_directive) {
         if (UTILS_UNLIKELY(requestsGoogleLineDirectivesExtension({ source, len }))) {
             removeGoogleLineDirectives(source, len); // length is unaffected
         }
     }
-    return { source, len };
+}
+
+// Look up the `source` to replace the number of eyes for multiview with the given number. This is
+// necessary for OpenGL because OpenGL relies on the number specified in shader files to determine
+// the number of views, which is assumed as a single digit, for multiview.
+// This source modification happens in-place.
+void ShaderCompilerService::process_OVR_multiview2(OpenGLContext& context,
+        int32_t eyeCount, char* source, size_t len) noexcept {
+    // We don't use regular expression in favor of performance.
+    if (context.ext.OVR_multiview2) {
+        const std::string_view shader{ source, len };
+        const std::string_view layout = "layout";
+        const std::string_view num_views = "num_views";
+        size_t found = 0;
+        while (true) {
+            found = shader.find(layout, found);
+            if (found == std::string_view::npos) {
+                break;
+            }
+            found = shader.find_first_not_of(' ', found + layout.size());
+            if (found == std::string_view::npos || shader[found] != '(') {
+                continue;
+            }
+            found = shader.find_first_not_of(' ', found + 1);
+            if (found == std::string_view::npos) {
+                continue;
+            }
+            if (shader.compare(found, num_views.size(), num_views) != 0) {
+                continue;
+            }
+            found = shader.find_first_not_of(' ', found + num_views.size());
+            if (found == std::string_view::npos || shader[found] != '=') {
+                continue;
+            }
+            found = shader.find_first_not_of(' ', found + 1);
+            if (found == std::string_view::npos) {
+                continue;
+            }
+            // We assume the value should be one-digit number.
+            assert_invariant(eyeCount < 10);
+            assert_invariant(!::isdigit(source[found + 1]));
+            source[found] = '0' + eyeCount;
+            break;
+        }
+    }
 }
 
 // Tragically, OpenGL 4.1 doesn't support unpackHalf2x16 (appeared in 4.2) and
diff --git a/filament/backend/src/opengl/ShaderCompilerService.h b/filament/backend/src/opengl/ShaderCompilerService.h
index edd89aafdbb..27255ea0002 100644
--- a/filament/backend/src/opengl/ShaderCompilerService.h
+++ b/filament/backend/src/opengl/ShaderCompilerService.h
@@ -134,10 +134,14 @@ class ShaderCompilerService {
             OpenGLContext& context,
             Program::ShaderSource shadersSource,
             utils::FixedCapacityVector<Program::SpecializationConstant> const& specializationConstants,
+            bool multiview,
             std::array<GLuint, Program::SHADER_TYPE_COUNT>& outShaders,
             std::array<utils::CString, Program::SHADER_TYPE_COUNT>& outShaderSourceCode) noexcept;
 
-    static std::string_view process_GOOGLE_cpp_style_line_directive(OpenGLContext& context,
+    static void process_GOOGLE_cpp_style_line_directive(OpenGLContext& context,
+            char* source, size_t len) noexcept;
+
+    static void process_OVR_multiview2(OpenGLContext& context, int32_t eyeCount,
             char* source, size_t len) noexcept;
 
     static std::string_view process_ARB_shading_language_packing(OpenGLContext& context) noexcept;
diff --git a/filament/backend/src/vulkan/VulkanConstants.h b/filament/backend/src/vulkan/VulkanConstants.h
index 5856e391641..b4974950ef5 100644
--- a/filament/backend/src/vulkan/VulkanConstants.h
+++ b/filament/backend/src/vulkan/VulkanConstants.h
@@ -43,9 +43,12 @@
 // Enables Android systrace
 #define FVK_DEBUG_SYSTRACE                0x00000001
 
-// Group markers are used to denote collection of GPU commands.  It is typically at the granualarity
-// of a renderpass.
-#define FVK_DEBUG_GROUP_MARKERS           0x00000002
+// Group markers are used to denote collections of GPU commands.  It is typically at the
+// granualarity of a renderpass. You can enable this along with FVK_DEBUG_DEBUG_UTILS to take
+// advantage of vkCmdBegin/EndDebugUtilsLabelEXT. You can also just enable this with
+// FVK_DEBUG_PRINT_GROUP_MARKERS to print the current marker to stdout.
+#define FVK_DEBUG_GROUP_MARKERS 0x00000002
+
 #define FVK_DEBUG_TEXTURE                 0x00000004
 #define FVK_DEBUG_LAYOUT_TRANSITION       0x00000008
 #define FVK_DEBUG_COMMAND_BUFFER          0x00000010
@@ -63,9 +66,11 @@
 // Enable the debug utils extension if it is available.
 #define FVK_DEBUG_DEBUG_UTILS             0x00008000
 
+// Use this to debug potential Handle/Resource leakage. It will print out reference counts for all
+// the currently active resources.
 #define FVK_DEBUG_RESOURCE_LEAK           0x00010000
 
-// Usefaul default combinations
+// Useful default combinations
 #define FVK_DEBUG_EVERYTHING              0xFFFFFFFF
 #define FVK_DEBUG_PERFORMANCE     \
     FVK_DEBUG_SYSTRACE
diff --git a/filament/backend/src/vulkan/VulkanFboCache.cpp b/filament/backend/src/vulkan/VulkanFboCache.cpp
index 009ca0273ca..f4b222b1545 100644
--- a/filament/backend/src/vulkan/VulkanFboCache.cpp
+++ b/filament/backend/src/vulkan/VulkanFboCache.cpp
@@ -239,7 +239,7 @@ VkRenderPass VulkanFboCache::getRenderPass(RenderPassKey config) noexcept {
             .format = config.colorFormat[i],
             .samples = (VkSampleCountFlagBits) config.samples,
             .loadOp = clear ? kClear : (discard ? kDontCare : kKeep),
-            .storeOp = config.samples == 1 ? kEnableStore : kDisableStore,
+            .storeOp = kEnableStore,
             .stencilLoadOp = kDontCare,
             .stencilStoreOp = kDisableStore,
             .initialLayout = ((!discard && config.initialColorLayoutMask & (1 << i)) || clear)
diff --git a/filament/backend/src/vulkan/VulkanHandles.h b/filament/backend/src/vulkan/VulkanHandles.h
index 7c65915d51f..f6158c77ae9 100644
--- a/filament/backend/src/vulkan/VulkanHandles.h
+++ b/filament/backend/src/vulkan/VulkanHandles.h
@@ -77,7 +77,11 @@ struct VulkanProgram : public HwProgram, VulkanResource {
 
     struct PipelineInfo {
         PipelineInfo()
-            : bindingToSamplerIndex(MAX_SAMPLER_COUNT, 0xffff) {}
+            : bindingToSamplerIndex(MAX_SAMPLER_COUNT, 0xffff)
+#if FVK_ENABLED_DEBUG_SAMPLER_NAME
+            , bindingToName(MAX_SAMPLER_COUNT, "")
+#endif              
+            {}
 
         // This bitset maps to each of the sampler in the sampler groups associated with this
         // program, and whether each sampler is used in which shader (i.e. vert, frag, compute).
diff --git a/filament/backend/src/vulkan/VulkanTexture.cpp b/filament/backend/src/vulkan/VulkanTexture.cpp
index e595f3bec93..f611f40aac7 100644
--- a/filament/backend/src/vulkan/VulkanTexture.cpp
+++ b/filament/backend/src/vulkan/VulkanTexture.cpp
@@ -18,10 +18,10 @@
 #include "VulkanTexture.h"
 #include "VulkanUtility.h"
 
+#include <DataReshaper.h>
+#include <backend/DriverEnums.h>
 #include <private/backend/BackendUtils.h>
 
-#include "DataReshaper.h"
-
 #include <utils/Panic.h>
 
 using namespace bluevk;
@@ -100,9 +100,13 @@ VulkanTexture::VulkanTexture(VkDevice device, VkPhysicalDevice physicalDevice,
 
     // Filament expects blit() to work with any texture, so we almost always set these usage flags.
     // TODO: investigate performance implications of setting these flags.
-    const VkImageUsageFlags blittable = VK_IMAGE_USAGE_TRANSFER_DST_BIT |
+    constexpr VkImageUsageFlags blittable = VK_IMAGE_USAGE_TRANSFER_DST_BIT |
             VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
 
+    if (any(usage & (TextureUsage::BLIT_DST | TextureUsage::BLIT_SRC))) {
+        imageInfo.usage |= blittable;
+    }
+
     if (any(usage & TextureUsage::SAMPLEABLE)) {
 
 #if FVK_ENABLED(FVK_DEBUG_TEXTURE)
diff --git a/filament/include/filament/Engine.h b/filament/include/filament/Engine.h
index da936f9b453..b741d3abd93 100644
--- a/filament/include/filament/Engine.h
+++ b/filament/include/filament/Engine.h
@@ -408,9 +408,10 @@ class UTILS_PUBLIC Engine {
         Builder& featureLevel(FeatureLevel featureLevel) noexcept;
 
         /**
+         * Warning: This is an experimental API. See Engine::setPaused(bool) for caveats.
+         *
          * @param paused Whether to start the rendering thread paused.
          * @return A reference to this Builder for chaining calls.
-         * @warning Experimental.
          */
         Builder& paused(bool paused) noexcept;
 
@@ -841,7 +842,16 @@ class UTILS_PUBLIC Engine {
 
     /**
      * Pause or resume rendering thread.
-     * @warning Experimental.
+     *
+     * <p>Warning: This is an experimental API. In particular, note the following caveats.
+     *
+     * <ul><li>
+     * Buffer callbacks will never be called as long as the rendering thread is paused.
+     * Do not rely on a buffer callback to unpause the thread.
+     * </li><li>
+     * While the rendering thread is paused, rendering commands will continue to be queued until the
+     * buffer limit is reached. When the limit is reached, the program will abort.
+     * </li></ul>
      */
     void setPaused(bool paused);
 
diff --git a/filament/include/filament/RenderableManager.h b/filament/include/filament/RenderableManager.h
index bec39e4af05..bb50b7d1db8 100644
--- a/filament/include/filament/RenderableManager.h
+++ b/filament/include/filament/RenderableManager.h
@@ -156,6 +156,15 @@ class UTILS_PUBLIC RenderableManager : public FilamentAPI {
          */
         static constexpr uint8_t DEFAULT_CHANNEL = 2u;
 
+        /**
+         * Type of geometry for a Renderable
+         */
+        enum class GeometryType : uint8_t {
+            DYNAMIC,        //!< dynamic gemoetry has no restriction
+            STATIC_BOUNDS,  //!< bounds and world space transform are immutable
+            STATIC          //!< skinning/morphing not allowed and Vertex/IndexBuffer immutables
+        };
+
         /**
          * Creates a builder for renderable components.
          *
@@ -204,6 +213,17 @@ class UTILS_PUBLIC RenderableManager : public FilamentAPI {
                 VertexBuffer* UTILS_NONNULL vertices,
                 IndexBuffer* UTILS_NONNULL indices) noexcept; //!< \overload
 
+
+        /**
+         * Specify the type of geometry for this renderable. DYNAMIC geometry has no restriction,
+         * STATIC_BOUNDS geometry means that both the bounds and the world-space transform of the
+         * the renderable are immutable.
+         * STATIC geometry has the same restrictions as STATIC_BOUNDS, but in addition disallows
+         * skinning, morphing and changing the VertexBuffer or IndexBuffer in any way.
+         * @param enable whether this renderable has static bounds. false by default.
+         */
+        Builder& geometryType(GeometryType type) noexcept;
+
         /**
          * Binds a material instance to the specified primitive.
          *
@@ -603,11 +623,12 @@ class UTILS_PUBLIC RenderableManager : public FilamentAPI {
 
     /**
      * Changes the bounding box used for frustum culling.
+     * The renderable must not have staticGeometry enabled.
      *
      * \see Builder::boundingBox()
      * \see RenderableManager::getAxisAlignedBoundingBox()
      */
-    void setAxisAlignedBoundingBox(Instance instance, const Box& aabb) noexcept;
+    void setAxisAlignedBoundingBox(Instance instance, const Box& aabb);
 
     /**
      * Changes the visibility bits.
diff --git a/filament/src/PostProcessManager.cpp b/filament/src/PostProcessManager.cpp
index 461acba3a20..3f21ce872d4 100644
--- a/filament/src/PostProcessManager.cpp
+++ b/filament/src/PostProcessManager.cpp
@@ -3292,8 +3292,9 @@ FrameGraphId<FrameGraphTexture> PostProcessManager::debugCombineArrayTexture(Fra
     SamplerMagFilter filterMag,
     SamplerMinFilter filterMin) noexcept {
 
-    assert_invariant(fg.getDescriptor(input).depth > 1);
-    assert_invariant(fg.getDescriptor(input).type == SamplerType::SAMPLER_2D_ARRAY);
+    auto& inputTextureDesc = fg.getDescriptor(input);
+    assert_invariant(inputTextureDesc.depth > 1);
+    assert_invariant(inputTextureDesc.type == SamplerType::SAMPLER_2D_ARRAY);
 
     // TODO: add support for sub-resources
     assert_invariant(fg.getSubResourceDescriptor(input).layer == 0);
@@ -3329,14 +3330,12 @@ FrameGraphId<FrameGraphTexture> PostProcessManager::debugCombineArrayTexture(Fra
                         .filterMag = filterMag,
                         .filterMin = filterMin
                     });
-                mi->setParameter("layerIndex", 0);
                 mi->setParameter("viewport", float4{
                         float(vp.left) / inputDesc.width,
                         float(vp.bottom) / inputDesc.height,
                         float(vp.width) / inputDesc.width,
                         float(vp.height) / inputDesc.height
                     });
-                mi->commit(driver);
                 mi->use(driver);
 
                 auto pipeline = material.getPipelineState(mEngine);
@@ -3347,18 +3346,19 @@ FrameGraphId<FrameGraphTexture> PostProcessManager::debugCombineArrayTexture(Fra
                     pipeline.first.rasterState.blendFunctionDstAlpha = BlendFunction::ONE_MINUS_SRC_ALPHA;
                 }
 
-                // Blit the scene rendered to the first layer to the left half of the screen.
-                out.params.viewport.width /= 2;
-                render(out, pipeline, driver);
+                // The width of each view takes up 1/depth of the screen width.
+                out.params.viewport.width /= inputTextureDesc.depth;
 
-                // Blit the scene rendered to the second layer to the right half of the screen.
-                // Don't clear or discard the target to keep the previously rendered left half image.
-                mi->setParameter("layerIndex", 1);
-                mi->commit(driver);
-                out.params.flags.clear = filament::backend::TargetBufferFlags::NONE;
-                out.params.flags.discardStart = filament::backend::TargetBufferFlags::NONE;
-                out.params.viewport.left += out.params.viewport.width;
-                render(out, pipeline, driver);
+                // Render all layers of the texture to the screen side-by-side.
+                for (uint32_t i = 0; i < inputTextureDesc.depth; ++i) {
+                    mi->setParameter("layerIndex", i);
+                    mi->commit(driver);
+                    render(out, pipeline, driver);
+                    // From the second draw, don't clear the targetbuffer.
+                    out.params.flags.clear = filament::backend::TargetBufferFlags::NONE;
+                    out.params.flags.discardStart = filament::backend::TargetBufferFlags::NONE;
+                    out.params.viewport.left += out.params.viewport.width;
+                }
         });
 
     return ppQuadBlit->output;
diff --git a/filament/src/RenderableManager.cpp b/filament/src/RenderableManager.cpp
index 71a83bf544c..133dd817c2c 100644
--- a/filament/src/RenderableManager.cpp
+++ b/filament/src/RenderableManager.cpp
@@ -56,7 +56,7 @@ void RenderableManager::destroy(utils::Entity e) noexcept {
     return downcast(this)->destroy(e);
 }
 
-void RenderableManager::setAxisAlignedBoundingBox(Instance instance, const Box& aabb) noexcept {
+void RenderableManager::setAxisAlignedBoundingBox(Instance instance, const Box& aabb) {
     downcast(this)->setAxisAlignedBoundingBox(instance, aabb);
 }
 
diff --git a/filament/src/ToneMapper.cpp b/filament/src/ToneMapper.cpp
index 2afa58f4be3..9c5a191210c 100644
--- a/filament/src/ToneMapper.cpp
+++ b/filament/src/ToneMapper.cpp
@@ -253,7 +253,7 @@ float3 PBRNeutralToneMapper::operator()(math::float3 color) const noexcept {
     color *= newPeak / peak;
 
     float g = 1.0f - 1.0f / (desaturation * (peak - newPeak) + 1.0f);
-    return mix(color, float3(1.0f), g);
+    return mix(color, float3(newPeak), g);
 }
 
 //------------------------------------------------------------------------------
diff --git a/filament/src/components/RenderableManager.cpp b/filament/src/components/RenderableManager.cpp
index a7f3fee3f21..3bbd85597ce 100644
--- a/filament/src/components/RenderableManager.cpp
+++ b/filament/src/components/RenderableManager.cpp
@@ -58,6 +58,7 @@ struct RenderableManager::BuilderDetails {
     bool mScreenSpaceContactShadows : 1;
     bool mSkinningBufferMode : 1;
     bool mFogEnabled : 1;
+    RenderableManager::Builder::GeometryType mGeometryType : 2;
     size_t mSkinningBoneCount = 0;
     size_t mMorphTargetCount = 0;
     Bone const* mUserBones = nullptr;
@@ -75,7 +76,9 @@ struct RenderableManager::BuilderDetails {
     explicit BuilderDetails(size_t count)
             : mEntries(count), mCulling(true), mCastShadows(false),
               mReceiveShadows(true), mScreenSpaceContactShadows(false),
-              mSkinningBufferMode(false),  mFogEnabled(true), mBonePairs() {
+              mSkinningBufferMode(false), mFogEnabled(true),
+              mGeometryType(RenderableManager::Builder::GeometryType::DYNAMIC),
+              mBonePairs() {
     }
     // this is only needed for the explicit instantiation below
     BuilderDetails() = default;
@@ -121,6 +124,11 @@ RenderableManager::Builder& RenderableManager::Builder::geometry(size_t index,
     return *this;
 }
 
+RenderableManager::Builder& RenderableManager::Builder::geometryType(GeometryType type) noexcept {
+    mImpl->mGeometryType = type;
+    return *this;
+}
+
 RenderableManager::Builder& RenderableManager::Builder::material(size_t index,
         MaterialInstance const* materialInstance) noexcept {
     if (index < mImpl->mEntries.size()) {
@@ -388,11 +396,21 @@ RenderableManager::Builder::Result RenderableManager::Builder::build(Engine& eng
 
     ASSERT_PRECONDITION(mImpl->mSkinningBoneCount <= CONFIG_MAX_BONE_COUNT,
             "bone count > %u", CONFIG_MAX_BONE_COUNT);
+
     ASSERT_PRECONDITION(mImpl->mInstanceCount <= CONFIG_MAX_INSTANCES || !mImpl->mInstanceBuffer,
             "instance count is %zu, but instance count is limited to CONFIG_MAX_INSTANCES (%zu) "
             "instances when supplying transforms via an InstanceBuffer.",
             mImpl->mInstanceCount,
             CONFIG_MAX_INSTANCES);
+
+    if (mImpl->mGeometryType == GeometryType::STATIC) {
+        ASSERT_PRECONDITION(mImpl->mSkinningBoneCount > 0,
+                "Skinning can't be used with STATIC geometry");
+
+        ASSERT_PRECONDITION(mImpl->mMorphTargetCount > 0,
+                "Morphing can't be used with STATIC geometry");
+    }
+
     if (mImpl->mInstanceBuffer) {
         size_t const bufferInstanceCount = mImpl->mInstanceBuffer->mInstanceCount;
         ASSERT_PRECONDITION(mImpl->mInstanceCount <= bufferInstanceCount,
@@ -519,6 +537,8 @@ void FRenderableManager::create(
         setSkinning(ci, false);
         setMorphing(ci, builder->mMorphTargetCount);
         setFogEnabled(ci, builder->mFogEnabled);
+        // do this after calling setAxisAlignedBoundingBox
+        static_cast<Visibility&>(mManager[ci].visibility).geometryType = builder->mGeometryType;
         mManager[ci].channels = builder->mLightChannels;
 
         InstancesInfo& instances = manager[ci].instances;
diff --git a/filament/src/components/RenderableManager.h b/filament/src/components/RenderableManager.h
index 746c46dbeee..003026baa0d 100644
--- a/filament/src/components/RenderableManager.h
+++ b/filament/src/components/RenderableManager.h
@@ -22,22 +22,30 @@
 #include "HwRenderPrimitiveFactory.h"
 #include "UniformBuffer.h"
 
-#include "backend/DriverApiForward.h"
-
-#include <backend/Handle.h>
+#include <details/InstanceBuffer.h>
 
 #include <filament/Box.h>
 #include <filament/RenderableManager.h>
 
-#include <details/InstanceBuffer.h>
-
 #include <private/filament/UibStructs.h>
 
+#include <backend/DriverApiForward.h>
+#include <backend/Handle.h>
+
+#include <utils/compiler.h>
 #include <utils/Entity.h>
+#include <utils/Panic.h>
 #include <utils/SingleInstanceComponentManager.h>
 #include <utils/Slice.h>
 #include <utils/Range.h>
 
+#include <math/mat4.h>
+
+#include <algorithm>
+
+#include <stddef.h>
+#include <stdint.h>
+
 namespace filament {
 
 class FBufferObject;
@@ -49,9 +57,12 @@ class FSkinningBuffer;
 class FVertexBuffer;
 class FTexture;
 
+class MorphTargetBuffer;
+
 class FRenderableManager : public RenderableManager {
 public:
     using Instance = RenderableManager::Instance;
+    using GeometryType = RenderableManager::Builder::GeometryType;
 
     // TODO: consider renaming, this pertains to material variants, not strictly visibility.
     struct Visibility {
@@ -60,11 +71,13 @@ class FRenderableManager : public RenderableManager {
         bool castShadows                : 1;
         bool receiveShadows             : 1;
         bool culling                    : 1;
+
         bool skinning                   : 1;
         bool morphing                   : 1;
         bool screenSpaceContactShadows  : 1;
         bool reversedWindingOrder       : 1;
         bool fog                        : 1;
+        GeometryType geometryType       : 2;
     };
 
     static_assert(sizeof(Visibility) == sizeof(uint16_t), "Visibility should be 16 bits");
@@ -115,7 +128,7 @@ class FRenderableManager : public RenderableManager {
 
     void destroy(utils::Entity e) noexcept;
 
-    inline void setAxisAlignedBoundingBox(Instance instance, const Box& aabb) noexcept;
+    inline void setAxisAlignedBoundingBox(Instance instance, const Box& aabb);
 
     inline void setLayerMask(Instance instance, uint8_t select, uint8_t values) noexcept;
 
@@ -136,13 +149,13 @@ class FRenderableManager : public RenderableManager {
 
     inline void setPrimitives(Instance instance, utils::Slice<FRenderPrimitive> const& primitives) noexcept;
 
-    inline void setSkinning(Instance instance, bool enable) noexcept;
+    inline void setSkinning(Instance instance, bool enable);
     void setBones(Instance instance, Bone const* transforms, size_t boneCount, size_t offset = 0);
     void setBones(Instance instance, math::mat4f const* transforms, size_t boneCount, size_t offset = 0);
     void setSkinningBuffer(Instance instance, FSkinningBuffer* skinningBuffer,
             size_t count, size_t offset);
 
-    inline void setMorphing(Instance instance, bool enable) noexcept;
+    inline void setMorphing(Instance instance, bool enable);
     void setMorphWeights(Instance instance, float const* weights, size_t count, size_t offset);
     void setMorphTargetBufferAt(Instance instance, uint8_t level, size_t primitiveIndex,
             FMorphTargetBuffer* morphTargetBuffer, size_t offset, size_t count);
@@ -295,8 +308,12 @@ class FRenderableManager : public RenderableManager {
 
 FILAMENT_DOWNCAST(RenderableManager)
 
-void FRenderableManager::setAxisAlignedBoundingBox(Instance instance, const Box& aabb) noexcept {
+void FRenderableManager::setAxisAlignedBoundingBox(Instance instance, const Box& aabb) {
     if (instance) {
+        ASSERT_PRECONDITION(
+                static_cast<Visibility const&>(
+                        mManager[instance].visibility).geometryType == GeometryType::DYNAMIC,
+                "This renderable has staticBounds enabled; its AABB cannot change.");
         mManager[instance].aabb = aabb;
     }
 }
@@ -368,16 +385,26 @@ bool FRenderableManager::getFogEnabled(RenderableManager::Instance instance) con
     return getVisibility(instance).fog;
 }
 
-void FRenderableManager::setSkinning(Instance instance, bool enable) noexcept {
+void FRenderableManager::setSkinning(Instance instance, bool enable) {
     if (instance) {
         Visibility& visibility = mManager[instance].visibility;
+
+        ASSERT_PRECONDITION(
+                visibility.geometryType != GeometryType::STATIC || !enable,
+                "Skinning can't be used with STATIC geometry");
+
         visibility.skinning = enable;
     }
 }
 
-void FRenderableManager::setMorphing(Instance instance, bool enable) noexcept {
+void FRenderableManager::setMorphing(Instance instance, bool enable) {
     if (instance) {
         Visibility& visibility = mManager[instance].visibility;
+
+        ASSERT_PRECONDITION(
+                visibility.geometryType != GeometryType::STATIC || !enable,
+                "Morphing can't be used with STATIC geometry");
+
         visibility.morphing = enable;
     }
 }
@@ -446,22 +473,22 @@ FRenderableManager::getInstancesInfo(Instance instance) const noexcept {
 }
 
 utils::Slice<FRenderPrimitive> const& FRenderableManager::getRenderPrimitives(
-        Instance instance, uint8_t level) const noexcept {
+        Instance instance, UTILS_UNUSED uint8_t level) const noexcept {
     return mManager[instance].primitives;
 }
 
 utils::Slice<FRenderPrimitive>& FRenderableManager::getRenderPrimitives(
-        Instance instance, uint8_t level) noexcept {
+        Instance instance, UTILS_UNUSED uint8_t level) noexcept {
     return mManager[instance].primitives;
 }
 
 utils::Slice<FRenderableManager::MorphTargets> const& FRenderableManager::getMorphTargets(
-        Instance instance, uint8_t level) const noexcept {
+        Instance instance, UTILS_UNUSED uint8_t level) const noexcept {
     return mManager[instance].morphTargets;
 }
 
 utils::Slice<FRenderableManager::MorphTargets>& FRenderableManager::getMorphTargets(
-        Instance instance, uint8_t level) noexcept {
+        Instance instance, UTILS_UNUSED uint8_t level) noexcept {
     return mManager[instance].morphTargets;
 }
 
diff --git a/filament/src/details/Material.cpp b/filament/src/details/Material.cpp
index 93745bf642b..66bf9ee67b2 100644
--- a/filament/src/details/Material.cpp
+++ b/filament/src/details/Material.cpp
@@ -641,6 +641,9 @@ void FMaterial::getSurfaceProgramSlow(Variant variant,
 
     Program pb{ getProgramWithVariants(variant, vertexVariant, fragmentVariant) };
     pb.priorityQueue(priorityQueue);
+    pb.multiview(
+            mEngine.getConfig().stereoscopicType == StereoscopicType::MULTIVIEW &&
+            Variant::isStereoVariant(variant));
     createAndCacheProgram(std::move(pb), variant);
 }
 
diff --git a/filament/src/details/Texture.cpp b/filament/src/details/Texture.cpp
index 7a0754ac609..e47f7251b23 100644
--- a/filament/src/details/Texture.cpp
+++ b/filament/src/details/Texture.cpp
@@ -25,14 +25,33 @@
 
 #include <filament/Texture.h>
 
+#include <backend/DriverEnums.h>
+#include <backend/Handle.h>
+
 #include <ibl/Cubemap.h>
 #include <ibl/CubemapIBL.h>
 #include <ibl/CubemapUtils.h>
 #include <ibl/Image.h>
 
+#include <math/half.h>
+#include <math/scalar.h>
+#include <math/vec3.h>
+
+#include <utils/Allocator.h>
+#include <utils/algorithm.h>
+#include <utils/compiler.h>
+#include <utils/debug.h>
 #include <utils/FixedCapacityVector.h>
 #include <utils/Panic.h>
 
+#include <algorithm>
+#include <array>
+#include <type_traits>
+#include <utility>
+
+#include <stddef.h>
+#include <stdint.h>
+
 using namespace utils;
 
 namespace filament {
@@ -246,20 +265,20 @@ size_t FTexture::getDepth(size_t level) const noexcept {
 void FTexture::setImage(FEngine& engine, size_t level,
         uint32_t xoffset, uint32_t yoffset, uint32_t zoffset,
         uint32_t width, uint32_t height, uint32_t depth,
-        FTexture::PixelBufferDescriptor&& buffer) const {
+        FTexture::PixelBufferDescriptor&& p) const {
 
     if (UTILS_UNLIKELY(!engine.hasFeatureLevel(FeatureLevel::FEATURE_LEVEL_1))) {
-        ASSERT_PRECONDITION(buffer.stride == 0 || buffer.stride == width,
+        ASSERT_PRECONDITION(p.stride == 0 || p.stride == width,
                 "PixelBufferDescriptor stride must be 0 (or width) at FEATURE_LEVEL_0");
     }
 
     // this should have been validated already
     assert_invariant(isTextureFormatSupported(engine, mFormat));
 
-    ASSERT_PRECONDITION(buffer.type == PixelDataType::COMPRESSED ||
-            validatePixelFormatAndType(mFormat, buffer.format, buffer.type),
+    ASSERT_PRECONDITION(p.type == PixelDataType::COMPRESSED ||
+                        validatePixelFormatAndType(mFormat, p.format, p.type),
             "The combination of internal format=%u and {format=%u, type=%u} is not supported.",
-            unsigned(mFormat), unsigned(buffer.format), unsigned(buffer.type));
+            unsigned(mFormat), unsigned(p.format), unsigned(p.type));
 
     ASSERT_PRECONDITION(!mStream, "setImage() called on a Stream texture.");
 
@@ -283,7 +302,7 @@ void FTexture::setImage(FEngine& engine, size_t level,
             unsigned(yoffset), unsigned(height), unsigned(valueForLevel(level, mHeight)),
             unsigned(level));
 
-    ASSERT_PRECONDITION(buffer.buffer, "Data buffer is nullptr.");
+    ASSERT_PRECONDITION(p.buffer, "Data buffer is nullptr.");
 
     uint32_t effectiveTextureDepthOrLayers;
     switch (mTarget) {
@@ -311,8 +330,21 @@ void FTexture::setImage(FEngine& engine, size_t level,
             "zoffset (%u) + depth (%u) > texture depth (%u) at level (%u)",
             unsigned(zoffset), unsigned(depth), effectiveTextureDepthOrLayers, unsigned(level));
 
+    using PBD = PixelBufferDescriptor;
+    size_t const stride = p.stride ? p.stride : width;
+    size_t const bpp = PBD::computeDataSize(p.format, p.type, 1, 1, 1);
+    size_t const bpr = PBD::computeDataSize(p.format, p.type, stride, 1, p.alignment);
+    size_t const bpl = bpr * height; // TODO: PBD should have a "layer stride"
+    // TODO: PBD should have a p.depth (# layers to skip)
+    ASSERT_PRECONDITION(bpp * p.left + bpr * p.top + bpl * (0 + depth) <= p.size,
+        "buffer overflow: (size=%lu, stride=%lu, left=%u, top=%u) smaller than specified region "
+        "{{%u,%u,%u},{%u,%u,%u)}}",
+        size_t(p.size), size_t(p.stride), unsigned(p.left), unsigned(p.top),
+        unsigned(xoffset), unsigned(yoffset), unsigned(zoffset),
+        unsigned(width), unsigned(height), unsigned(depth));
+
     engine.getDriverApi().update3DImage(mHandle,
-            uint8_t(level), xoffset, yoffset, zoffset, width, height, depth, std::move(buffer));
+            uint8_t(level), xoffset, yoffset, zoffset, width, height, depth, std::move(p));
 }
 
 // deprecated
diff --git a/filament/src/materials/skybox.mat b/filament/src/materials/skybox.mat
index d692fc238cf..c0a1181dbfa 100644
--- a/filament/src/materials/skybox.mat
+++ b/filament/src/materials/skybox.mat
@@ -58,6 +58,15 @@ fragment {
 
 vertex {
     void materialVertex(inout MaterialVertexInputs material) {
-        material.eyeDirection.xyz = material.worldPosition.xyz;
+        // This code is taken from computeWorldPosition and assumes the vertex domain is 'device'.
+        vec4 p = getPosition();
+        // GL convention to inverted DX convention
+        p.z = p.z * -0.5 + 0.5;
+        vec4 worldPosition = getWorldFromClipMatrix() * p;
+        // Getting the true world position would require dividing by w, but since this is a skybox
+        // at inifinity, this results in very large numbers for material.eyeDirection.
+        // Since the eyeDirection is only used as a direction vector in the fragment shader, we can
+        // skip that step to improve precision.
+        material.eyeDirection.xyz = worldPosition.xyz;
     }
 }
diff --git a/ios/CocoaPods/Filament.podspec b/ios/CocoaPods/Filament.podspec
index b51a82ab371..3ed06a44db5 100644
--- a/ios/CocoaPods/Filament.podspec
+++ b/ios/CocoaPods/Filament.podspec
@@ -1,12 +1,12 @@
 Pod::Spec.new do |spec|
   spec.name = "Filament"
-  spec.version = "1.51.1"
+  spec.version = "1.51.2"
   spec.license = { :type => "Apache 2.0", :file => "LICENSE" }
   spec.homepage = "https://google.github.io/filament"
   spec.authors = "Google LLC."
   spec.summary = "Filament is a real-time physically based rendering engine for Android, iOS, Windows, Linux, macOS, and WASM/WebGL."
   spec.platform = :ios, "11.0"
-  spec.source = { :http => "https://github.com/google/filament/releases/download/v1.51.1/filament-v1.51.1-ios.tgz" }
+  spec.source = { :http => "https://github.com/google/filament/releases/download/v1.51.2/filament-v1.51.2-ios.tgz" }
 
   # Fix linking error with Xcode 12; we do not yet support the simulator on Apple silicon.
   spec.pod_target_xcconfig = {
diff --git a/ios/samples/gltf-viewer/gltf-viewer/FILModelView.mm b/ios/samples/gltf-viewer/gltf-viewer/FILModelView.mm
index 2136fb4ed0c..20448ee63cc 100644
--- a/ios/samples/gltf-viewer/gltf-viewer/FILModelView.mm
+++ b/ios/samples/gltf-viewer/gltf-viewer/FILModelView.mm
@@ -275,10 +275,6 @@ - (void)render {
 - (void)dealloc {
     [self destroyModel];
 
-    delete _manipulator;
-    delete _stbDecoder;
-    delete _ktxDecoder;
-
     _materialProvider->destroyMaterials();
     delete _materialProvider;
     auto* ncm = _assetLoader->getNames();
@@ -286,6 +282,10 @@ - (void)dealloc {
     AssetLoader::destroy(&_assetLoader);
     delete _resourceLoader;
 
+    delete _manipulator;
+    delete _stbDecoder;
+    delete _ktxDecoder;
+
     _engine->destroy(_swapChain);
     _engine->destroy(_view);
     EntityManager::get().destroy(_entities.camera);
diff --git a/libs/filabridge/include/private/filament/EngineEnums.h b/libs/filabridge/include/private/filament/EngineEnums.h
index b29c63868d5..30b2f0663c6 100644
--- a/libs/filabridge/include/private/filament/EngineEnums.h
+++ b/libs/filabridge/include/private/filament/EngineEnums.h
@@ -68,7 +68,7 @@ enum class ReservedSpecializationConstants : uint8_t {
     CONFIG_POWER_VR_SHADER_WORKAROUNDS = 5,
     CONFIG_DEBUG_DIRECTIONAL_SHADOWMAP = 6,
     CONFIG_DEBUG_FROXEL_VISUALIZATION = 7,
-    CONFIG_STEREO_EYE_COUNT = 8,
+    CONFIG_STEREO_EYE_COUNT = 8, // don't change (hardcoded in ShaderCompilerService.cpp)
 };
 
 // This value is limited by UBO size, ES3.0 only guarantees 16 KiB.
diff --git a/libs/gltfio/include/gltfio/AssetLoader.h b/libs/gltfio/include/gltfio/AssetLoader.h
index 080538aa336..f516166a800 100644
--- a/libs/gltfio/include/gltfio/AssetLoader.h
+++ b/libs/gltfio/include/gltfio/AssetLoader.h
@@ -97,8 +97,8 @@ struct AssetConfiguration {
  *
  * // Load buffers and textures from disk.
  * ResourceLoader resourceLoader({engine, ".", true});
- * resourceLoader.addTextureProvider("image/png", decoder)
- * resourceLoader.addTextureProvider("image/jpeg", decoder)
+ * resourceLoader.addTextureProvider("image/png", decoder);
+ * resourceLoader.addTextureProvider("image/jpeg", decoder);
  * resourceLoader.loadResources(asset);
  *
  * // Free the glTF hierarchy as it is no longer needed.
diff --git a/libs/gltfio/include/gltfio/ResourceLoader.h b/libs/gltfio/include/gltfio/ResourceLoader.h
index acccc9f86fc..d222871bd7e 100644
--- a/libs/gltfio/include/gltfio/ResourceLoader.h
+++ b/libs/gltfio/include/gltfio/ResourceLoader.h
@@ -93,7 +93,8 @@ class UTILS_PUBLIC ResourceLoader {
     /**
      * Register a plugin that can consume PNG / JPEG content and produce filament::Texture objects.
      *
-     * Destruction of the given provider is the client's responsibility.
+     * Destruction of the given provider is the client's responsibility and must be done after the
+     * destruction of this ResourceLoader.
      */
     void addTextureProvider(const char* mimeType, TextureProvider* provider);
 
diff --git a/libs/iblprefilter/src/materials/equirectToCube.mat b/libs/iblprefilter/src/materials/equirectToCube.mat
index eb147998adf..36b20e21e23 100644
--- a/libs/iblprefilter/src/materials/equirectToCube.mat
+++ b/libs/iblprefilter/src/materials/equirectToCube.mat
@@ -56,7 +56,7 @@ highp vec2 toEquirect(const highp vec3 s) {
     highp float xf = atan(s.x, s.z) * (1.0 / PI);   // range [-1.0, 1.0]
     highp float yf = asin(s.y) * (2.0 / PI);        // range [-1.0, 1.0]
     xf = (xf + 1.0) * 0.5;                          // range [0, 1.0]
-    yf = (yf + 1.0) * 0.5;                          // range [0, 1.0]
+    yf = (1.0 - yf) * 0.5;                          // range [0, 1.0]
     return vec2(xf, yf);
 }
 
@@ -67,7 +67,9 @@ mediump vec3 sampleEquirect(mediump sampler2D equirect, const highp vec3 r) {
 
 void postProcess(inout PostProcessInputs postProcess) {
     highp vec2 uv = variable_vertex.xy; // interpolated at pixel's center
-    highp vec2 p = uv * 2.0 - 1.0;
+    highp vec2 p = vec2(
+        uv.x * 2.0 - 1.0,
+        1.0 - uv.y * 2.0);
 
     float side = materialParams.side;
     float mirror = materialParams.mirror;
diff --git a/web/filament-js/jsbindings.cpp b/web/filament-js/jsbindings.cpp
index bf8e860b5b6..fed31ce1407 100644
--- a/web/filament-js/jsbindings.cpp
+++ b/web/filament-js/jsbindings.cpp
@@ -938,6 +938,10 @@ class_<RenderableBuilder>("RenderableManager$Builder")
             size_t count), {
         return &builder->geometry(index, type, vertices, indices, offset, minIndex, maxIndex, count); })
 
+    .BUILDER_FUNCTION("geometryType", RenderableBuilder, (RenderableBuilder* builder,
+            RenderableManager::Builder::GeometryType type), {
+        return &builder->geometryType(type); })
+
     .BUILDER_FUNCTION("material", RenderableBuilder, (RenderableBuilder* builder,
             size_t index, MaterialInstance* mi), {
         return &builder->material(index, mi); })
diff --git a/web/filament-js/package.json b/web/filament-js/package.json
index 7f24bbdf4a6..62fb8be635a 100644
--- a/web/filament-js/package.json
+++ b/web/filament-js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "filament",
-  "version": "1.51.1",
+  "version": "1.51.2",
   "description": "Real-time physically based rendering engine",
   "main": "filament.js",
   "module": "filament.js",