As you can see the face above the window is miscolored. It’s not a problem with the texture cause in blender it’s fine. I’ve even tried replacing the texture and nothing. Im not new to blender just modeling big things for games
Some textures from what I can recall aren’t carried over from Blender to Roblox and vice versa. Though, I’m not completely understanding, it could also be that transparency doesn’t carry over from blender if that’s what is the issue. Because I’m not completely sure, I also would like to advise that meshes don’t have proper lighting physics as they are treated as i guess you could say “3d textures” rather than physical objects because it’s being read as a file.