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-rw-r--r--servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl2
-rw-r--r--servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl2
2 files changed, 2 insertions, 2 deletions
diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl
index 23f56fd42d..945926d43d 100644
--- a/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl
+++ b/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl
@@ -850,7 +850,7 @@ void main() {
if (scene_data.roughness_limiter_enabled) {
//http://www.jp.square-enix.com/tech/library/pdf/ImprovedGeometricSpecularAA.pdf
float roughness2 = roughness * roughness;
- vec3 dndu = dFdx(normal), dndv = dFdx(normal);
+ vec2 dndu = dFdx(normal), dndv = dFdy(normal);
float variance = scene_data.roughness_limiter_amount * (dot(dndu, dndu) + dot(dndv, dndv));
float kernelRoughness2 = min(2.0 * variance, scene_data.roughness_limiter_limit); //limit effect
float filteredRoughness2 = min(1.0, roughness2 + kernelRoughness2);
diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
index d488c99b6d..23edc47f88 100644
--- a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
+++ b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
@@ -761,7 +761,7 @@ void main() {
if (scene_data.roughness_limiter_enabled) {
//http://www.jp.square-enix.com/tech/library/pdf/ImprovedGeometricSpecularAA.pdf
float roughness2 = roughness * roughness;
- vec3 dndu = dFdx(normal), dndv = dFdx(normal);
+ vec3 dndu = dFdx(normal), dndv = dFdy(normal);
float variance = scene_data.roughness_limiter_amount * (dot(dndu, dndu) + dot(dndv, dndv));
float kernelRoughness2 = min(2.0 * variance, scene_data.roughness_limiter_limit); //limit effect
float filteredRoughness2 = min(1.0, roughness2 + kernelRoughness2);