Make sun cascades overlap a bit

Author: pragma37

Malt/Render/Lighting.py

@@ -311,6 +311,11 @@ def lerp(a,b,f):
     for i in range(1, len(splits)):
         near = splits[i-1]
         far = splits[i]
+        # Make the cascades overlap a bit
+        if i > 1 :
+            near = lerp(near, splits[i-1], 0.01)
+        if i+1 < len(splits):
+            far = lerp(far, splits[i+1], 0.01)
         cascades.append(sun_shadowmap_matrix(sun_from_world_matrix, view_from_world_matrix, near, far, sample_offset, resolution))
 
     return cascades

Malt/Shaders/Lighting/Lighting.glsl

@@ -188,7 +188,7 @@ ShadowData sun_shadow(vec3 position, Light light, sampler2DArray shadowmap, floa
 
         S.light_uv = S.light_space * 0.5 + 0.5;
 
-        if(S.light_space == clamp(S.light_space, vec3(-1), vec3(1)))
+        if(S.light_space == clamp(S.light_space, vec3(-0.99), vec3(0.99)))
         {
             S.depth = texture(shadowmap, vec3(S.light_uv.xy, index)).x;
             S.shadow = S.depth < S.light_uv.z - bias;