Restore isotropic fallback for roughness_dual

AcademySoftwareFoundation · Aug 3, 2019 · f60538f · f60538f
1 parent 5ee03bb
commit f60538f
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diff --git a/libraries/pbrlib/genglsl/mx_roughness_dual.glsl b/libraries/pbrlib/genglsl/mx_roughness_dual.glsl
@@ -1,5 +1,9 @@
 void mx_roughness_dual(vec2 roughness, out vec2 result)
 {
+    if (roughness.y < 0.0)
+    {
+        roughness.y = roughness.x;
+    }
     result.x = clamp(roughness.x * roughness.x, M_FLOAT_EPS, 1.0);
     result.y = clamp(roughness.y * roughness.y, M_FLOAT_EPS, 1.0);
 }
diff --git a/libraries/pbrlib/genosl/mx_roughness_dual.osl b/libraries/pbrlib/genosl/mx_roughness_dual.osl
@@ -1,5 +1,9 @@
 void mx_roughness_dual(vector2 roughness, output vector2 result)
 {
+    if (roughness.y < 0.0)
+    {
+        roughness.y = roughness.x;
+    }
     result.x = clamp(roughness.x * roughness.x, M_FLOAT_EPS, 1.0);
     result.y = clamp(roughness.y * roughness.y, M_FLOAT_EPS, 1.0);
 }