use these commands when taking screenshots.
Code:
sv_cheats 1
cl_drawhud 0
r_drawviewmodel 0
As for the map itself I think your relying on props too much and should work on brush work. Try adding a few stories on the building, with windows and various other details. Adding a counter or market of some sort will add more detail to the front of the building.
Take a look at koth_king and get some ideas and inspiration from it (seeing as though it meets with your map style thus far and is one of the most detailed maps ive seen.