We have good tutorials on the modular page. Blending together tiled textures is still very very relevant. http://wiki.polycount.com/wiki/Modular_environments
The room is looks very bland and depressing. The textures are really dull and everything blends together into a brown mess. Improvements to the lighting setup may help.
This is awesome! my only crit being the backgrounds are to colorful and and close to the player colors, they blend into the bg a lot, which could be considered unfair imo.