I have downloaded many mats from the Massassi mat section.. the problem is.. they create bad glitches in Jedi Knight. I need to use grass, its part of my level, but it makes such a bad glitch! At a certain angle, I can see through the ground and into the river beyond it, which isn't good, cause there's a secret room along the river, and you can see it through the ground.. How do I fix this... or should I just use mats that Jedi Knight provided?