diff --git a/src/g_levellocals.h b/src/g_levellocals.h
index 9d97e47ac..a268fbba1 100644
--- a/src/g_levellocals.h
+++ b/src/g_levellocals.h
@@ -475,7 +475,7 @@ public:
 	float SunIntensity = 0.f;
 	uint16_t LightmapSampleDistance = 0;
 	bool LightBounce = false;
-	bool AmbientOcclusion = false;
+	bool AmbientOcclusion = true;
 
 	// Portal information.
 	FDisplacementTable Displacements;
diff --git a/src/maploader/maploader.cpp b/src/maploader/maploader.cpp
index e2bbbc8db..52d734dd5 100644
--- a/src/maploader/maploader.cpp
+++ b/src/maploader/maploader.cpp
@@ -3242,7 +3242,7 @@ void MapLoader::LoadLevel(MapData *map, const char *lumpname, int position)
 	Level->SunIntensity = gameinfo.defaultSunIntensity;
 	Level->LightmapSampleDistance = gameinfo.defaultLightmapSampleDistance;
 	Level->lightmaps = gameinfo.forceEnableLightmaps;
-	Level->LightBounce = true;
+	Level->LightBounce = false;
 	Level->AmbientOcclusion = true;
 
 	// note: most of this ordering is important