There have been a lot of great model railroads built in TRAINZ and I have seen the screenshots and the videos and downloaded several myself. The one universal characteristic of just about all of these routes is the red brick walls. I am wondering if there are any variations on this theme? Concrete bricks? Concrete walls? Sandstone bricks? Wood paneling? Knotty Pine? Maybe basement windows? :O) Maybe none of that renders well, and obviously the real creative effort is on the layouts themselves, but it is just a curiosity of mine....