diff --git a/textures.cpp b/textures.cpp
index 8e3e2f58..882230fd 100644
--- a/textures.cpp
+++ b/textures.cpp
@@ -351,6 +351,8 @@ bool texture_config::apply(cell *c, const transmatrix &V, int col) {
       }
 
     lastptd().u.poly.tinf = &mi;
+    if(whirl::whirl) 
+      lastptd().u.poly.flags = POLY_INVERSE;
     if(grid_color) {
       queuepolyat(V, shFullFloor[ctof(c)], 0, PPR_FLOOR);
       lastptd().u.poly.outline = grid_color;