diff --git a/Engine/source/terrain/hlsl/terrFeatureHLSL.cpp b/Engine/source/terrain/hlsl/terrFeatureHLSL.cpp
index 6c94e0743..e5025cf30 100644
--- a/Engine/source/terrain/hlsl/terrFeatureHLSL.cpp
+++ b/Engine/source/terrain/hlsl/terrFeatureHLSL.cpp
@@ -446,7 +446,7 @@ void TerrainDetailMapFeatHLSL::processPix(   Vector<ShaderComponent*> &component
    }
 
    // Add to the blend total.
-   meta->addStatement( new GenOp( "   @ = max( @, @ );\r\n", blendTotal, blendTotal, detailBlend ) );
+   meta->addStatement( new GenOp( "   @ += @;\r\n", blendTotal, detailBlend ) );
 
    // If we had a parallax feature... then factor in the parallax
    // amount so that it fades out with the layer blending.