Since I can't see your scene, I can't really say what's the problem. Or maybe I'm just not being very observant. Anyway, mirroring poly can work fine since the modeling toolkit has a symmetry feature so there's that option. Hi Gen, Ok, i take back what i said about solving the problem i have. After i combine both halfs of the plane i no long have the power of modding one half so it effects the opposite side. Everything in my first post is still relevant to the selected options I'm using aswell.