diff --git a/src/DETHRACE/common/oil.c b/src/DETHRACE/common/oil.c
index b3857227..7c8a4c59 100644
--- a/src/DETHRACE/common/oil.c
+++ b/src/DETHRACE/common/oil.c
@@ -41,6 +41,8 @@ void InitOilSpills() {
         the_material->flags |= BR_MATF_LIGHT;
         the_material->flags |= BR_MATF_PERSPECTIVE;
         the_material->flags |= BR_MATF_SMOOTH;
+	// TODO: added by dethrace, investigate why oil spills in OG do not need this flag set to render correctly
+        the_material->flags |= BR_MATF_TWO_SIDED;
         the_material->index_range = 0;
         the_material->colour_map = NULL;
         BrMatrix23Identity(&the_material->map_transform);
diff --git a/src/harness/renderers/gl/gl_renderer.c b/src/harness/renderers/gl/gl_renderer.c
index eda17217..9fc3737a 100644
--- a/src/harness/renderers/gl/gl_renderer.c
+++ b/src/harness/renderers/gl/gl_renderer.c
@@ -501,6 +501,12 @@ void setActiveMaterial(tStored_material* material) {
         glUniform1i(uniforms_3d.light_value, -1);
     }
 
+    if (material->flags & (BR_MATF_TWO_SIDED | BR_MATF_ALWAYS_VISIBLE)) {
+        glDisable(GL_CULL_FACE);
+    } else {
+        glEnable(GL_CULL_FACE);
+    }
+
     if (material->pixelmap) {
         tStored_pixelmap* stored_px = material->pixelmap->stored;
         if (stored_px != NULL) {