I've seem to encounter some kind of anomaly in my model. I have created a model of a car, composed out of multiple meshes. After joining the pieces together, i began texturing the model, however, the UV maps of certain parts are stretched (but cleanly unwrapped) and distorted in a certain direction, while some unwrap normally.
I've nailed the problem down to where it seems only the base, or mesh i began with unwraps normally, while the other meshes i joined onto it have bad unwraps. I've tried unwrapping individual faces and get the same result, even after marking seams
What is causing this?