I've started with the beveling. All successful but i have a problem when beveling the windows: Here are close-ups before smoothing and after smoothing the beveled windows: Before After I have no idea why this happens, all i've done was adding a bevel to the windows. I've tried to the use the Cleanup tool to split faces that are 5 vertices, i've tried merging vertices (in case there are any discconections), still no luck though. any ideas? :headbang: