I have what i believe to be a MAJOR problem and need advice on how to fix it. I'm a noob mapper so if this does turn out to be me making mountain out of a molehill then my bad. Bascically somewhere along the line something has happened to cause my map to become misaligned like this: As you can see in the 2nd picture (which is the bottom left box on the default windows, one of the sides) the horizontal lines seem okay, yet the rest is a complete mess My best guess is that the entire map has been scaled at some point and i didn't notice, but I don't think I could be that stupid, at least I hope . I think this could spell doom for the whole map as there are many tiny gaps between walls and roofs which aren't visible, but may be picked up by vvis and could totally mess things up. Even if it doesn't do this, It is impossible to add more detail and stuff unless I do it by eye without snapping to grid. Please tell me this can be solved , if not I am determined to begin again and it may actually turn out better since I learnt about optimisation half way through making it so it wouldn't be too bad i guess... Anyway, that's the problem, any advice at all would help, even if you just think I should start again.