Odd behavior of walls in the middle of working on a map

While working on a CC3+ map, when I created walls or rooms, the walls started acting oddly depending on zone level. Portions would become transparent depending on how close I was zoomed in. The walls seem to have odd breaks in them, and they aren't just visual artifacts since when I turn on sheet effects, there are shadows around the breaks. Pictures are attached showing the corridor and room with the newly created walls. I thought it might be a glitch, so I saved the map, closed everything and rebooted the machine. When I resumed working on the map, I get the same behavior.
I'm sure this is a result of user error, but I can't figure out what I'm doing to cause breaks in walls in corridors. Anyone seen this behavior before and know what causes it?


  • Thanks for the help :) I certainly wouldn't have ever come up with that as an answer, especially since the breaks produced shadows. The solution above works as described.
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