Anything related to Will Smith and his krazy kult gets an automatic thumbs down from me, but as Korash said, since you're involved in it, I may watch...
I think you're on the right way. Those mountains looks better. But you can also go on a light way ot hatch : just 4 or 5 kind of neat diagonal lines...
also, don't restrict yourselves to the paper textures, the grunge, concrete, plastic, earth, soil and even some barks are great for grunging up a map...
Some times ago I wrote a few materials about Yphyrion, a city set in a light steampunk ambience. I decided to give it a shot on a map, close to some...