[Android] Issue when try render an occluder

[duy-maimanh]

Hello everyone.
I try to custom ModelViewer.kt and I found a problem.
I have two FilamentAsset ("assetOne", "assetTwo"). I want assetOne to be invisible but still cover assetTwo.
I set priority for assetOne = 2 and assetTwo = 4.
and set material like this (read/write in depth buffer, don't write anything into color buffer) :

assetOne?.let { asset ->
            MaterialBuilder.init()
            val matPackage = MaterialBuilder()
                .platform(MaterialBuilder.Platform.MOBILE)
                .name("Clear coat")
                .colorWrite(false)
                .depthWrite(true)
                .shading(MaterialBuilder.Shading.LIT)
                .uniformParameter(MaterialBuilder.UniformType.FLOAT3, "baseColor")
                .material(
                    "void material(inout MaterialInputs material) {\n" +
                            "    prepareMaterial(material);\n" +
                            "    material.baseColor.rgb = materialParams.baseColor;\n" +
                            "}\n"
                )
                .optimization(MaterialBuilder.Optimization.NONE)
                .build()
            if (matPackage.isValid) {
                val buffer = matPackage.buffer
                material = Material.Builder().payload(buffer, buffer.remaining()).build(engine)
            }
            MaterialBuilder.shutdown()
            materialInstance = material.createInstance()
            materialInstance.setParameter("baseColor", Colors.RgbType.SRGB, 0.0f, 0.0f, 0.0f)
            val index = engine.renderableManager.getInstance(asset.entities[0])
            engine.renderableManager.setMaterialInstanceAt(index, 0, materialInstance)
        }

You can see the result: Part of the glasses frame was invisible.

But when I set a cube (same sample-lit-cube, only change size and color) behind the glasses. The glasses frames are display strangely.

renderable = EntityManager.get().create()
        RenderableManager.Builder(1)
            // Overall bounding box of the renderable
            .boundingBox(Box(0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f))
            // Sets the mesh data of the first primitive, 6 faces of 6 indices each
            .geometry(
                0,
                RenderableManager.PrimitiveType.TRIANGLES,
                vertexBuffer,
                indexBuffer,
                0,
                6 * 6
            )
            // Sets the material of the first primitive
            .material(0, materialInstance)
            .priority(0)
            .build(modelViewer.engine, renderable)
        // Add the entity to the scene to render it
        modelViewer.scene.addEntity(renderable)

Do you have any advice?