I am new to Unity but I’ve been working with Blender for almost 6 months now, for school purposes my classmates and I are going to make a game project. Today I decided to check out Unity and Import our 1st Model, unfortunately I met this problem. My Model seems to have been stretched or inflated as opposed to what it should really look like.
That’s likely from smoothing, when normals are used to make hard edges look softer. You can turn it down or off entirely in the import settings menu under the model tab. Play around with the Normals and Tangents section until you find a setting you like.