diff --git a/tools/quake3/q3map2/surface.cpp b/tools/quake3/q3map2/surface.cpp
index 0d918929..90fe69f9 100644
--- a/tools/quake3/q3map2/surface.cpp
+++ b/tools/quake3/q3map2/surface.cpp
@@ -3089,7 +3089,7 @@ void FilterDrawsurfsIntoTree( entity_t& e, tree_t& tree ){
 		/* get shader */
 		shaderInfo_t *si = ds.shaderInfo;
 
-		/* ydnar: skybox surfaces are special */
+		/* ydnar: skybox surfaces are special */ /* these are ones generated by MakeSkyboxSurface() */
 		if ( ds.skybox ) {
 			refs = AddReferenceToTree_r( ds, tree.headnode, true );
 			ds.skybox = false;
@@ -3257,7 +3257,7 @@ void FilterDrawsurfsIntoTree( entity_t& e, tree_t& tree ){
 				}
 			}
 
-			/* ydnar: handle skybox surfaces */
+			/* ydnar: handle skybox surfaces */ /* these are ones found in _skybox area */
 			if ( ds.skybox ) {
 				MakeSkyboxSurface( ds );
 				numSkyboxSurfaces++;