Add fix for vflipped UDIMs ARNOLD-13463

autodesk-forks · Dec 20, 2023 · 7435ca0 · 7435ca0
1 parent 4b03b39
commit 7435ca0
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/libraries/stdlib/genosl/lib/mx_transform_uv_vflip.osl b/libraries/stdlib/genosl/lib/mx_transform_uv_vflip.osl
@@ -1,4 +1,8 @@
 vector2 mx_transform_uv(vector2 texcoord)
 {
-    return vector2(texcoord.x, 1.0 - texcoord.y);
+    float vlookup = 1.0 - texcoord.y;
+    float vfloor  = floor(texcoord.y);
+    float vfrac   = texcoord.y - vfloor;
+    vlookup = vfloor + (1.0 - vfrac);
+    return vector2(texcoord.x, vlookup);
 }