Lightmap is kind of meh...
But I am happy to fix the texture part on your map if you can give me a decompiled version since I am too lazy to do that part myself (find a mrs compiler and all crap XD).

Once compiled -> decompile -> open the .rs -> add .../ infront of Castle or Mansion or w/e it said, that way it will load the texture from Castle.mrs so you do not have to waste space with adding the...

I am sure you wasted space on copying MAIET textures in the map folder instead of using the redirection with xml (saving kbs).
Also the lightmap seems meh..

http://1.bp.blogspot.com/-6gG_jLAjguY/USCwE6c9H5I/AAAAAAAAKpQ/TYl3IIuZFSk/s1600/sloth-no.gif
Original V4 map is made by Jurien (it is a different map tho)?