Odd Lighting After Build

I can’t believe I never thought of the fact that they were squares! When I bake now they do this though, Screenshot - f6501d33cf7c5ef275c6644a0e5473ad - Gyazo

could it be that I still have one side that isn’t even with the others? (They are walls so I didn’t want them to extend a lot, so I only have X and Z equal to eachother while the Y isn’t)