I dont get it. So i did a new test. I created a object,pic related. And then it was just a flat plane, so i Unfold3D it, and in the pic you can see the result (it was the Back side result). So then i did a thickness to this object, and separeted it in 2 parts, the front and the back.
The back side i Unfolde3D it, and i got a nice result. But then my front side got weird. It was supose to get the same clean result as the back side, but look at it. Its a curved UV Shell. I dont get it why....it is a plane, isnt it? The same as the back side of it, but still the result is weird...(pic related)