thanks dude you have some pretty good work as well!!!

coo, i saw your stuff on the art guild and on here. I like your 3d models on Z-brush. i can't speak too thoroughly on that, because i just dont know zbrush yet.

On the environmental pics,  like what you are doing. Above all, be extremely careful with the composition. If I had to pick the weakest part of all of the pictures, it would be the way the picture is composed.  Some things look a bit too flat to the screen.  Or some shapes are repeating over each other.   For example, in the sand land picture. one sand dune is directly below the other.   If you look at the picture and blur your eyes out of focus for a moment, it will create a subtle line shape that should not be there.

Other then that, i feel you are doing fine.  I like the detail in your buildings, and I like your color palette.  :D

-Enrique

love your works they look amazing :)