pcf NoL

Author: azer89

Shaders/ShadowMapping/PCF.glsl

@@ -1,13 +1,16 @@
 float ShadowPCF(vec4 shadowCoord, uint cascadeIndex)
 {
+	vec3 N = normalize(normal);
+	vec3 L = normalize(shadowUBO.lightPosition.xyz - worldPos);
+	float NoL = dot(N, L);
+
 	ivec2 texDim = textureSize(shadowMap, 0).xy;
-	float scale = shadowUBO.pcfScale;
+
+	// (1.0 - NoL) allows more blur for vertical surfaces
+	float scale = shadowUBO.pcfScale + (1.0 - NoL);
 	float dx = scale * 1.0 / float(texDim.x);
 	float dy = scale * 1.0 / float(texDim.y);
 
-	vec3 N = normalize(normal);
-	vec3 L = normalize(shadowUBO.lightPosition.xyz - worldPos);
-	float NoL = dot(N, L);
 	float bias = max(shadowUBO.shadowMaxBias * (1.0 - NoL), shadowUBO.shadowMinBias);
 
 	// TODO Find out a better blurring technique concerning multiple shadow maps