diff --git a/src/doom/m_crispy.c b/src/doom/m_crispy.c
index c9e67036c..53666e963 100644
--- a/src/doom/m_crispy.c
+++ b/src/doom/m_crispy.c
@@ -25,6 +25,7 @@
 #include "s_sound.h"
 #include "r_defs.h" // [crispy] laserpatch
 #include "r_sky.h" // [crispy] R_InitSkyMap()
+#include "z_zone.h" // [crispy] Z_Free()
 
 #include "m_crispy.h"
 
@@ -516,6 +517,17 @@ static void M_CrispyToggleSmoothLightingHook (void)
 {
     crispy->smoothlight = !crispy->smoothlight;
 
+#ifdef CRISPY_TRUECOLOR
+    // [crispy] zero out colormaps[] array so it can be
+    // reallocated and recalculated in R_InitColormaps()
+    if (colormaps != NULL)
+    {
+        Z_Free(colormaps);
+        colormaps = NULL;
+    }
+    // [crispy] re-calculate light tables and amount of colormaps
+    R_InitColormaps();
+#endif
     // [crispy] re-calculate the zlight[][] array
     R_InitLightTables();
     // [crispy] re-calculate the scalelight[][] array
diff --git a/src/doom/m_menu.c b/src/doom/m_menu.c
index aa048a6c6..8af456c72 100644
--- a/src/doom/m_menu.c
+++ b/src/doom/m_menu.c
@@ -2789,7 +2789,6 @@ boolean M_Responder (event_t* ev)
             I_SetPalette (W_CacheLumpName (DEH_String("PLAYPAL"),PU_CACHE));
 #else
             {
-		extern void R_InitColormaps (void);
 		I_SetPalette (0);
 		R_InitColormaps();
 		inhelpscreens = true;
diff --git a/src/doom/p_user.c b/src/doom/p_user.c
index 21bc0efeb..f55447cab 100644
--- a/src/doom/p_user.c
+++ b/src/doom/p_user.c
@@ -34,7 +34,12 @@
 
 
 // Index of the special effects (INVUL inverse) map.
+#ifndef CRISPY_TRUECOLOR
 #define INVERSECOLORMAP		32
+#else
+// [crispy] parameterized for smooth diminishing lighting
+int INVERSECOLORMAP;
+#endif
 
 
 //
diff --git a/src/doom/r_data.c b/src/doom/r_data.c
index aebbd3354..f21ac7138 100644
--- a/src/doom/r_data.c
+++ b/src/doom/r_data.c
@@ -1196,6 +1196,21 @@ void R_InitColormaps (void)
 	byte *const playpal = W_CacheLumpName("PLAYPAL", PU_STATIC);
 	byte *const colormap = W_CacheLumpName("COLORMAP", PU_STATIC);
 
+	// [crispy] Smoother diminished lighting.
+	// Compiled in but not enabled TrueColor mode
+	// can't use more than original 32 colormaps.
+	if (crispy->truecolor && crispy->smoothlight)
+	{
+		NUMCOLORMAPS = 256;
+	}
+	else
+	{
+		NUMCOLORMAPS = 32;
+	}
+	// [crispy] Regardless of the number of color maps,
+	// invulnerability is always the last one.
+	INVERSECOLORMAP = NUMCOLORMAPS;
+
 	if (!colormaps)
 	{
 		colormaps = (lighttable_t*) Z_Malloc((NUMCOLORMAPS + 1) * 256 * sizeof(lighttable_t), PU_STATIC, 0);
diff --git a/src/doom/r_main.c b/src/doom/r_main.c
index 71d68dd81..19cc26eb7 100644
--- a/src/doom/r_main.c
+++ b/src/doom/r_main.c
@@ -111,6 +111,9 @@ lighttable_t***		zlight = NULL;
 int			extralight;			
 
 // [crispy] parameterized for smooth diminishing lighting
+#ifdef CRISPY_TRUECOLOR
+int NUMCOLORMAPS;
+#endif
 int LIGHTLEVELS;
 int LIGHTSEGSHIFT;
 int LIGHTBRIGHT;
@@ -699,13 +702,38 @@ void R_InitLightTables (void)
    // [crispy] smooth diminishing lighting
     if (crispy->smoothlight)
     {
-	LIGHTLEVELS = 32;
-	LIGHTSEGSHIFT = 3;
-	LIGHTBRIGHT = 2;
-	MAXLIGHTSCALE = 48;
-	LIGHTSCALESHIFT = 12;
-	MAXLIGHTZ = 1024;
-	LIGHTZSHIFT = 17;
+#ifndef CRISPY_TRUECOLOR
+		LIGHTLEVELS = 32;
+		LIGHTSEGSHIFT = 3;
+		LIGHTBRIGHT = 2;
+		MAXLIGHTSCALE = 48;
+		LIGHTSCALESHIFT = 12;
+		MAXLIGHTZ = 1024;
+		LIGHTZSHIFT = 17;
+#else
+		if (crispy->truecolor)
+		{
+		// [crispy] if in TrueColor mode, use smoothest diminished lighting
+		LIGHTLEVELS = 256;
+		LIGHTSEGSHIFT = 0;
+		LIGHTBRIGHT = 15;
+		MAXLIGHTSCALE = 376;
+		LIGHTSCALESHIFT = 9;
+		MAXLIGHTZ = 1024;
+		LIGHTZSHIFT = 17;
+		}
+		else
+		{
+		// [crispy] else, use paletted paletted approach
+		LIGHTLEVELS = 32;
+		LIGHTSEGSHIFT = 3;
+		LIGHTBRIGHT = 2;
+		MAXLIGHTSCALE = 48;
+		LIGHTSCALESHIFT = 12;
+		MAXLIGHTZ = 1024;
+		LIGHTZSHIFT = 17;
+		}
+#endif
     }
     else
     {
diff --git a/src/doom/r_main.h b/src/doom/r_main.h
index e3fc7961b..0bcd2d311 100644
--- a/src/doom/r_main.h
+++ b/src/doom/r_main.h
@@ -80,7 +80,13 @@ extern lighttable_t*	fixedcolormap;
 
 // Number of diminishing brightness levels.
 // There a 0-31, i.e. 32 LUT in the COLORMAP lump.
+#ifndef CRISPY_TRUECOLOR
 #define NUMCOLORMAPS		32
+#else
+// [crispy] parameterized for smooth diminishing lighting
+extern int NUMCOLORMAPS;
+extern int INVERSECOLORMAP;
+#endif
 
 // Blocky/low detail mode.
 //B remove this?
@@ -200,6 +206,7 @@ void R_Init (void);
 // Called by M_Responder.
 void R_SetViewSize (int blocks, int detail);
 
+void R_InitColormaps(void);
 void R_ExecuteSetViewSize(void);