I'm having this weird problem with our models. The polies are shaded all wrong. I suppose pictures speak for themselves:
As you can see, there's all kinds of lines on the roof and on the back in the corner. The windows also have some strange effects. So then I tried to fix it. Which worked, but only partially:
The roof still has some strange shade effect on it, although it isn't as prominent as it was before. The windows are still unchanged. The corner on the back seems to be fixed, but I don't know why that did work and the other places are still messed up. So does anyone know what's wrong, and how I can fix it?