diff --git a/src/engine/renderer/gl_shader.cpp b/src/engine/renderer/gl_shader.cpp
index 3af41a6d68..47d19c524b 100644
--- a/src/engine/renderer/gl_shader.cpp
+++ b/src/engine/renderer/gl_shader.cpp
@@ -573,6 +573,7 @@ static std::string GenEngineConstants() {
 	if ( glConfig2.dynamicLight )
 	{
 		AddDefine( str, "r_dynamicLight", 1 );
+		AddDefine( str, "r_dynamicLightRenderer", r_dynamicLightRenderer.Get() );
 	}
 
 	if ( r_precomputedLighting->integer )
diff --git a/src/engine/renderer/glsl_source/computeLight_fp.glsl b/src/engine/renderer/glsl_source/computeLight_fp.glsl
index 194acd3110..4513748ae0 100644
--- a/src/engine/renderer/glsl_source/computeLight_fp.glsl
+++ b/src/engine/renderer/glsl_source/computeLight_fp.glsl
@@ -175,7 +175,8 @@ int nextIdx( inout idxs_t idxs ) {
 
 const int numLayers = MAX_REF_LIGHTS / 256;
 
-#if defined(r_dynamicLight)
+// This code is only used by the tiled dynamic light renderer.
+#if defined(r_dynamicLight) && r_dynamicLightRenderer == 1
 void computeDynamicLight( int idx, vec3 P, vec3 normal, vec3 viewDir, vec4 diffuse,
 		    vec4 material, inout vec4 color ) {
   vec4 center_radius = GetLight( idx, center_radius );
diff --git a/src/engine/renderer/glsl_source/lightMapping_fp.glsl b/src/engine/renderer/glsl_source/lightMapping_fp.glsl
index 63ec85c6c6..1aa67b33c2 100644
--- a/src/engine/renderer/glsl_source/lightMapping_fp.glsl
+++ b/src/engine/renderer/glsl_source/lightMapping_fp.glsl
@@ -161,8 +161,8 @@ void main()
 		computeLight(lightColor, diffuse, color);
 	#endif
 
-	// Blend dynamic lights.
-	#if defined(r_dynamicLight)
+	// Blend dynamic lights, this code is only used by the tiled dynamic light renderer.
+	#if defined(r_dynamicLight) && r_dynamicLightRenderer == 1
 		computeDynamicLights(var_Position, normal, viewDir, diffuse, material, color);
 	#endif
 
diff --git a/src/engine/renderer/tr_shade.cpp b/src/engine/renderer/tr_shade.cpp
index 781550e7e7..c99eb83699 100644
--- a/src/engine/renderer/tr_shade.cpp
+++ b/src/engine/renderer/tr_shade.cpp
@@ -510,54 +510,55 @@ void Tess_Begin( void ( *stageIteratorFunc )(),
                  int fogNum,
                  bool bspSurface )
 {
-	shader_t *state;
-
 	tess.numIndexes = 0;
 	tess.numVertexes = 0;
 	tess.attribsSet = 0;
 	tess.multiDrawPrimitives = 0;
 
+	tess.stageIteratorFunc = stageIteratorFunc;
+	tess.stageIteratorFunc2 = stageIteratorFunc2;
+
+	tess.surfaceShader = surfaceShader;
+	tess.lightShader = lightShader;
+
+	tess.skipTangentSpaces = skipTangentSpaces;
+	tess.lightmapNum = lightmapNum;
+	tess.fogNum = fogNum;
+	tess.bspSurface = bspSurface;
+
 	// materials are optional
-	if ( surfaceShader != nullptr )
+	if ( tess.surfaceShader )
 	{
-		state = ( surfaceShader->remappedShader ) ? surfaceShader->remappedShader : surfaceShader;
+		if ( tess.surfaceShader->remappedShader )
+		{
+			tess.surfaceShader = surfaceShader->remappedShader;
+		}
 
-		tess.surfaceShader = state;
-		tess.surfaceStages = state->stages;
-		tess.surfaceLastStage = state->lastStage;
+		if ( tess.surfaceShader->isSky )
+		{
+			tess.stageIteratorFunc = &Tess_StageIteratorSky;
+		}
 
-		Tess_MapVBOs( false );
+		tess.surfaceStages = tess.surfaceShader->stages;
+		tess.surfaceLastStage = tess.surfaceShader->lastStage;
 	}
 	else
 	{
-		state = nullptr;
+		/* No code is using this on purpose, this is kept because of the
+		scary comment above saying:
 
-		tess.surfaceShader = nullptr;
+		> A surface may be forced to perform a Tess_End due to overflow. */
 		tess.surfaceStages = nullptr;
 		tess.surfaceLastStage = nullptr;
-		Tess_MapVBOs( false );
 	}
 
-	tess.lightShader = lightShader;
-
-	tess.stageIteratorFunc = stageIteratorFunc;
-	tess.stageIteratorFunc2 = stageIteratorFunc2;
+	Tess_MapVBOs( false );
 
 	if ( !tess.stageIteratorFunc )
 	{
 		Sys::Error( "tess.stageIteratorFunc == NULL" );
 	}
 
-	if ( state != nullptr && state->isSky )
-	{
-		tess.stageIteratorFunc = &Tess_StageIteratorSky;
-	}
-
-	tess.skipTangentSpaces = skipTangentSpaces;
-	tess.lightmapNum = lightmapNum;
-	tess.fogNum = fogNum;
-	tess.bspSurface = bspSurface;
-
 	if ( r_logFile->integer )
 	{
 		// don't just call LogComment, or we will get
diff --git a/src/engine/renderer/tr_shader.cpp b/src/engine/renderer/tr_shader.cpp
index 125d6bd7c7..1af486e9b3 100644
--- a/src/engine/renderer/tr_shader.cpp
+++ b/src/engine/renderer/tr_shader.cpp
@@ -5224,6 +5224,13 @@ static void FinishStages()
 		// We should cancel overBrightBits if there is no light stage.
 		stage->shaderHasNoLight = shaderHasNoLight;
 
+		// We should not cancel overbright on decals.
+		if ( shader.sort == Util::ordinal(shaderSort_t::SS_DECAL) )
+		{
+			// HACK: Reuse that boolean.
+			stage->shaderHasNoLight = false;
+		}
+
 		// Available textures.
 		bool hasNormalMap = stage->bundle[ TB_NORMALMAP ].image[ 0 ] != nullptr;
 		bool hasHeightMap = stage->bundle[ TB_HEIGHTMAP ].image[ 0 ] != nullptr;