RedDash16

LOL... How is it possible for rodster to have posted a comment 4 minutes ago, in spite of it not showing up for me while I wrote mine in less than a minute?

Anyway, in case nothing works, you can always provide a downoad for that WIP and let people have a look. When you start mapping, these problem can happen on occasion due to not entirely understanding how all the stuff actually works. Usually it's not a big deal, but if you don't find such an issue early, and you end up with a detailed area with several hundred vertices, then it will be harder to find the source of the problem.

Another thing you could look for is if there's 2 linedefs crossing one another without there being a vertice where they "touch", so to speak.

Hey, Thank you all for your replies I believe it was something to do with my lines. I ended up just remaking the sector and everything seems to be okay. I got much more responses than I thought I would. Thanks a ton everyone :)

be sure to test the map in several source-ports to be on the safe side of things. Some ports, like GZDoom, compensate for some mapping issues entirely automatically, while others might not do that. So if your map is going to get released publically at some point, it might be a good idea to have a look at that.