diff --git a/src/gl/renderer/gl_colormap.h b/src/gl/renderer/gl_colormap.h
index 33c1a8337..46e36431e 100644
--- a/src/gl/renderer/gl_colormap.h
+++ b/src/gl/renderer/gl_colormap.h
@@ -14,6 +14,7 @@ enum EColorManipulation
 	CM_INVALID=-1,
 	CM_DEFAULT=0,					// untranslated
 	CM_FIRSTSPECIALCOLORMAP,		// first special fixed colormap
+	CM_FIRSTSPECIALCOLORMAPFORCED= 0x08000000,	// first special fixed colormap, application forced (for 2D overlays)
 
 	CM_FOGLAYER = 0x10000000,	// Sprite shaped fog layer
 
@@ -23,6 +24,7 @@ enum EColorManipulation
 };
 
 #define CM_MAXCOLORMAP int(CM_FIRSTSPECIALCOLORMAP + SpecialColormaps.Size())
+#define CM_MAXCOLORMAPFORCED int(CM_FIRSTSPECIALCOLORMAPFORCED + SpecialColormaps.Size())
 
 
 #endif
diff --git a/src/gl/renderer/gl_renderer.cpp b/src/gl/renderer/gl_renderer.cpp
index b59f45e61..28d31ca8e 100644
--- a/src/gl/renderer/gl_renderer.cpp
+++ b/src/gl/renderer/gl_renderer.cpp
@@ -546,7 +546,7 @@ void FGLRenderer::Draw2D(F2DDrawer *drawer)
 			if (index < 0 || (unsigned)index >= SpecialColormaps.Size()) index = 0;	// if it isn't in the table FBitmap cannot use it. Shouldn't happen anyway.
 			if (!gl.legacyMode)
 			{ 
-				gl_RenderState.SetFixedColormap(CM_FIRSTSPECIALCOLORMAP + int(index));
+				gl_RenderState.SetFixedColormap(CM_FIRSTSPECIALCOLORMAPFORCED + int(index));
 			}
 			else
 			{
diff --git a/src/gl/renderer/gl_renderstate.cpp b/src/gl/renderer/gl_renderstate.cpp
index 2f6b11515..b93d77de7 100644
--- a/src/gl/renderer/gl_renderstate.cpp
+++ b/src/gl/renderer/gl_renderstate.cpp
@@ -253,9 +253,9 @@ bool FRenderState::ApplyShader()
 		{
 			activeShader->muFixedColormap.Set(0);
 		}
-		else if (mColormapState > CM_DEFAULT && mColormapState < CM_MAXCOLORMAP)
+		else if ((mColormapState >= CM_FIRSTSPECIALCOLORMAP && mColormapState < CM_MAXCOLORMAPFORCED))
 		{
-			if (FGLRenderBuffers::IsEnabled())
+			if (FGLRenderBuffers::IsEnabled() && mColormapState < CM_FIRSTSPECIALCOLORMAPFORCED)
 			{
 				// When using postprocessing to apply the colormap, we must render the image fullbright here.
 				activeShader->muFixedColormap.Set(2);
@@ -263,13 +263,20 @@ bool FRenderState::ApplyShader()
 			}
 			else
 			{
-				FSpecialColormap *scm = &SpecialColormaps[mColormapState - CM_FIRSTSPECIALCOLORMAP];
-				float m[] = { scm->ColorizeEnd[0] - scm->ColorizeStart[0],
-					scm->ColorizeEnd[1] - scm->ColorizeStart[1], scm->ColorizeEnd[2] - scm->ColorizeStart[2], 0.f };
+				if (mColormapState >= CM_FIRSTSPECIALCOLORMAPFORCED)
+				{
+					auto colormapState = mColormapState + CM_FIRSTSPECIALCOLORMAP - CM_FIRSTSPECIALCOLORMAPFORCED;
+					if (colormapState < CM_MAXCOLORMAP)
+					{
+						FSpecialColormap *scm = &SpecialColormaps[colormapState - CM_FIRSTSPECIALCOLORMAP];
+						float m[] = { scm->ColorizeEnd[0] - scm->ColorizeStart[0],
+							scm->ColorizeEnd[1] - scm->ColorizeStart[1], scm->ColorizeEnd[2] - scm->ColorizeStart[2], 0.f };
 
-				activeShader->muFixedColormap.Set(1);
-				activeShader->muColormapStart.Set(scm->ColorizeStart[0], scm->ColorizeStart[1], scm->ColorizeStart[2], 0.f);
-				activeShader->muColormapRange.Set(m);
+						activeShader->muFixedColormap.Set(1);
+						activeShader->muColormapStart.Set(scm->ColorizeStart[0], scm->ColorizeStart[1], scm->ColorizeStart[2], 0.f);
+						activeShader->muColormapRange.Set(m);
+					}
+				}
 			}
 		}
 		else if (mColormapState == CM_FOGLAYER)