To be more specific, I'm making a glass table that consists of two parts: the legs part, which has a metallic material, and the glass top, which has a glass material. Do I have to UV unwrap them, or it's pointless if there is no texture applied to them?
As I know, if I want to import it to a game engine, they need at least one UV map for the lightmap. Though I'm not sure.
So please tell me if I need them or not. Thank you