Fixing lights and shadows

resources/shaders/night_fog.vertex

@@ -6,6 +6,7 @@ varying vec2 texCoord;
 varying float fogDistance;
 varying vec3 fragViewPos;
 varying vec3 fragNormal;
+varying vec2 fragWorldXZ;
 
 uniform mat4 ProjectionModelViewMatrix;
 uniform mat4 ModelViewMatrix;
@@ -19,4 +20,5 @@ void main()
 	texCoord = vTexCoord;
 	fragViewPos = eyePos.xyz;
 	fragNormal = mat3(ModelViewMatrix) * vNormal;
+	fragWorldXZ = vPosition.xz;
 }