Oh, and just a comment...
Okay, so I'm using a ceiling height of 7000 (I have to). When you guys said there would be graphic errors, I didn't think they would be as horrible as they're coming. Usually, random sectors that are perfectly fine just totally explode as if they're broken in some way, but they aren't... I thought for a second it was Wad Author's fault, considering it's not really the best at building nodes, but even using ZenNode, the errors remained.
I'm FORCED to use the ceiling height of 7000. Is there any possible way to keep these errors from happening? Even if it's just an idea, seriously, I'm going out of my mind.