Unwrapping problems

I’m trying to UV map this ship. I’ve created several islands that actually unwrapped pretty well, but some reason, the “arms” of the ship aren’t unwrapping right. I’ve placed seams to separate them from the rest of the ship, and then I have one seam along the length of the arms, to unwrap it like a cylinder, though it isn’t a cylinder. The other sections were unwrapped similar, but they worked without a hitch. I probably won’t even have to do any tweaking to those.

The attached file is the .blend of the ship. I have hidden almost the whole ship, because it wrapped fine. The remaining part that shows is what I can’t get to unwrap right. I left the seams that I was trying to use. It looks like blender is adding seams that I don’t actually have because it is making too many islands. Can someone look at it and tell me how I can get it to work right please?? I don’t want someone to do it for me, rather I want to do it myself. I have watched and read several tutorials on UV unwrapping, and I have done it before without any problems, but for some reason this one doesn’t want to work.

By the way, I’m using blender 2.49. Thank you in advance.


ship.blend (190 KB)

You have some internal faces inside the arms. Delete them, recalculated the face normals (Ctrl+N) and then unwrap.


I could see the problem, but I don’t know what caused it. Anyway, I selected just the arms, and pressed U >> Unwrap, and it unwrapped perfectly according to the seams you placed. Of course it is necessary to then scale and reposition the islands, if you unwrap pieces separately, but it’s usually a good idea to do that anyway. Anyway, it seems to work ok for me.
(edit) ah, good eye, Richard. I missed those.

Thanks guys. I remember seeing about internal faces screwing things up, but I completely forgot about it in the heat of the blending battle. That did the trick.