add floodfill light propagation in vl fog. fix up nether and end shaders. tweaked shadows some. improved filtering for shadows/ssao, and VL fog. improved the "clouds intersect terrain" setting

shaders/dimensions/DH_solid.fsh

@@ -118,7 +118,7 @@ void main() {
 	vec2 PackLightmaps = lightmapCoords;
 
     // PackLightmaps.y *= 1.05;
-    // PackLightmaps = min(max(PackLightmaps  - 0.001*blueNoise(),0.0)*1.002,1.0);
+    PackLightmaps = min(max(PackLightmaps,0.0)*1.05,1.0);
     
     vec4 data1 = clamp( encode(normals.xyz, PackLightmaps), 0.0, 1.0);