I've been messing around with the Pullman custom asset example in blender recently. For some reason the lit windows are appearing to be black in-game instead of the original light beige. The car itself seems fine when viewing it in blender, but I don't know what happened when exporting it for use in-game. Any reason why this might be happening and how to fix it? For those curious, I exported the the lit windows as an obj. file.