Do you mean that you have a double sided piece of clothing, and that the weights on one side are different than the back side? quickest way to solve that which I know if is to select by vertex and apply weights by flood fill. Then you can smooth it afterwards if needed. This way you can make a vertex selection in wireframe…
@Alex_J I wonder how well this works in practice. Losing GI in a scene originally designed and lit for it would have a very significant impact visually, I feel like you'd need 2 different lighting scenarios for lumen on and lumen off. I almost feel that I wouldn't even bother with trying to support both. Unreals current…