So I have been playing around with several maps the last couple weeks trying to learns some of the ins and outs, and have not run into this problem at all. Now that I have actually started to work on the map I want to move forward with I have. The problem is that when I enable world composition so that I can sublevel the foliage, etc I fall through the map. I unclick it and the landscape works just fine. Anyone have any idea why it only happens when w.c. is enabled?