I’m currently creating a game where I have buildings with opaque windows, and I’d like to know whether it’d be better for optimization for me to use 1 big part that spans the entire building to create a window or two small parts on either side of the building.
It depends, if you want both ends to have different colors/textures go with example one, else go with example two. If you get Z-Fighting (If both parts have the same size on one axis) then go with example one and DON’T UNION!!!