Reply To: how and why? my unwrapping is a disaster
@patdoc Thanks for uploading your .blend. I can confirm the “impossible” geo as spikey pointed out. Notice how the 2 faces I select are overlapping with each other:
It’s hard to say exactly what happened to get here, but I would bet it’s the knife tool. Sometimes knife cut connections aren’t as they appear. You have to be careful with it.
You need to clean all your geo to eliminate the bad (impossible) stuff. Then your unwrap should perform as expected.