fix missing ibl reconstruction from dfg multiscattering

LiveTrower · web-flow · commit e1e19332447d · 2025-05-24T20:10:02.000-06:00
diff --git a/servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl b/servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl
@@ -2078,7 +2078,7 @@ void fragment_shader(in SceneData scene_data) {
 
 		// cheap luminance approximation
 		float f90 = clamp(50.0 * f0.g, metallic, 1.0);
-		indirect_specular_light *= energy_compensation * (f90 * envBRDF.x + f0 * envBRDF.y);
+		indirect_specular_light *= energy_compensation * ((f90 - f0) * envBRDF.x + f0 * envBRDF.y);
 #endif
 	}
 

Original file line number	Diff line number	Diff line change
`@@ -2078,7 +2078,7 @@ void fragment_shader(in SceneData scene_data) {`
`2078`	`2078`
`2079`	`2079`	`// cheap luminance approximation`
`2080`	`2080`	`float f90 = clamp(50.0 * f0.g, metallic, 1.0);`
`2081`		`- indirect_specular_light = energy_compensation (f90 * envBRDF.x + f0 * envBRDF.y);`
	`2081`	`+ indirect_specular_light = energy_compensation ((f90 - f0) * envBRDF.x + f0 * envBRDF.y);`
`2082`	`2082`	`#endif`
`2083`	`2083`	`}`
`2084`	`2084`