I would like to know how the texture is mapped onto a UV-Map. What calculations do a program like substance painter (in my example)? I am asking because I got some problems with the texture and want to understand the underlying workflow of UV-Mapping and texture-mapping.
Eventhough the UV-Map looks fine, the texture is not correctly applied onto the mesh.
EDIT: After I found out that he UV-Map is the problem I tried to figure out where to set the seams. The Smart-UV project helped but of course the result is not that well. In order to understand the UV-Mapping I made another project with the same mesh. Now the Smart-UV project throws an error and I still won't get it unwrapped. It's just impossible.