Merge pull request #7394 from Popov72/csm-improve-cascadeblend

Improve cascade blending in CSM

dist/preview release/what's new.md

@@ -53,6 +53,7 @@
 - PNG support for browsers not supporting SVG ([RaananW](https://github.com/RaananW/))
 - Device orientation event permissions for iOS 13+ ([RaananW](https://github.com/RaananW/))
 - Added `DirectionalLight.autoCalcShadowZBounds` to automatically compute the `shadowMinZ` and `shadowMaxZ` values ([Popov72](https://github.com/Popov72))
+- Improved cascade blending in CSM shadow technic ([Popov72](https://github.com/Popov72))
 
 ### Engine
 

src/Shaders/ShadersInclude/shadowsFragmentFunctions.fx

@@ -120,11 +120,6 @@
             vec2 uv = 0.5 * clipSpace.xy + vec2(0.5);
             vec3 uvLayer = vec3(uv.x, uv.y, layer);
 
-            if (uv.x < 0. || uv.x > 1.0 || uv.y < 0. || uv.y > 1.0)
-            {
-                return 1.0;
-            }
-
             float shadowPixelDepth = clamp(depthMetric, 0., 1.0);
 
             #ifndef SHADOWFLOAT
@@ -258,11 +253,6 @@
             vec3 clipSpace = vPositionFromLight.xyz / vPositionFromLight.w;
             vec3 uvDepth = vec3(0.5 * clipSpace.xyz + vec3(0.5));
 
-            if (uvDepth.x < 0. || uvDepth.x > 1.0 || uvDepth.y < 0. || uvDepth.y > 1.0)
-            {
-                return 1.0;
-            }
-
             uvDepth.z = clamp(uvDepth.z, 0., GREATEST_LESS_THAN_ONE);
 
             vec4 uvDepthLayer = vec4(uvDepth.x, uvDepth.y, layer, uvDepth.z);
@@ -280,11 +270,6 @@
             vec3 clipSpace = vPositionFromLight.xyz / vPositionFromLight.w;
             vec3 uvDepth = vec3(0.5 * clipSpace.xyz + vec3(0.5));
 
-            if (uvDepth.x < 0. || uvDepth.x > 1.0 || uvDepth.y < 0. || uvDepth.y > 1.0)
-            {
-                return 1.0;
-            }
-
             uvDepth.z = clamp(uvDepth.z, 0., GREATEST_LESS_THAN_ONE);
 
             vec2 uv = uvDepth.xy * shadowMapSizeAndInverse.x;	// uv in texel units
@@ -321,11 +306,6 @@
             vec3 clipSpace = vPositionFromLight.xyz / vPositionFromLight.w;
             vec3 uvDepth = vec3(0.5 * clipSpace.xyz + vec3(0.5));
 
-            if (uvDepth.x < 0. || uvDepth.x > 1.0 || uvDepth.y < 0. || uvDepth.y > 1.0)
-            {
-                return 1.0;
-            }
-
             uvDepth.z = clamp(uvDepth.z, 0., GREATEST_LESS_THAN_ONE);
 
             vec2 uv = uvDepth.xy * shadowMapSizeAndInverse.x;	// uv in texel units
@@ -600,11 +580,6 @@
             vec3 clipSpace = vPositionFromLight.xyz / vPositionFromLight.w;
             vec3 uvDepth = vec3(0.5 * clipSpace.xyz + vec3(0.5));
 
-            if (uvDepth.x < 0. || uvDepth.x > 1.0 || uvDepth.y < 0. || uvDepth.y > 1.0)
-            {
-                return 1.0;
-            }
-
             uvDepth.z = clamp(uvDepth.z, 0., GREATEST_LESS_THAN_ONE);
 
             vec4 uvDepthLayer = vec4(uvDepth.x, uvDepth.y, layer, uvDepth.z);