I'm making a spike pit with a lot of spikes. However when I compile it, some spikes are not displayed, however, they still block player movement. What could cause this?
(http://wstaw.org/m/2011/07/30/good_jpg_300x300_q85.jpg) (http://wstaw.org/h/9bbbfc0abca/)
Duplicate brushes.
Duplicate brushes? Why do they cause this? I made this pit by Ctrl+C/Ctrl+V'ing an initial spike btw.
Duplicate overlapping brushes. The spike that are missing have two or more brushes in the exact same place. Delete them. I don't quite know why it happens, but it happens without fail.