Texture tree and terrain scene, refactoring and cleanup

data/shaders/shadowmappingcascade/depthpass.frag

@@ -1,5 +1,13 @@
 #version 450
 
+layout (set = 1, binding = 0) uniform sampler2D colorMap;
+
+layout (location = 0) in vec2 inUV;
+
 void main() 
 {	
+	float alpha = texture(colorMap, inUV).a;
+	if (alpha < 0.5) {
+		discard;
+	}
 }