|
Your modifier stack is a mess, collapse it. You're going to have to do that to run this fix, anyways:
If your model is scaled in world-coordinates unevenly, when you auto-unwrap it will scale the UVs like you have. I'm going to guess at some point this object was a cylinder and you scaled it up to get the correct length.
To fix this, go to the utilities panel (the hammer). Click the Reset XForm utility button, this will bring up some UI underneath.
NOTE: THIS WILL WIPE YOUR UNDO HISTORY WHEN YOU PUSH THIS BUTTON.
Press the Reset-Xforms button with your mesh selected. Then collapse the stack down.
Now when you use an auto-unwrap it will unwrap to proper scale, and you can begin stitching your mesh together.
I think (not sure) that stitch and other functions also behave oddly with uneven UV scaling. In general, scaling at object-level is a bad idea, and you should scale in sub-object level instead.
|