Hey spirit... thank for the infos.

That map I build in 6 minutes, exacly, it is not a final map for any game. I just made for shadow tests. That's why looks poor, dont worry.

Yeah, I read other tutorials and tips, I build another map now to test shadows again. The fact is, if I build my map using blocks, it will stay ugly, with blocks I cannot manage to let an edge looks smoth, they are always like a square.

I will keep trying...