Modeling sofa - problem with sewn parts

[Franciszek_O]

I tryed to use bevel at the beginning but still - after adding subsurf modyfier it was a mess.
I’ve already found a solution in this topic:

Sofa Seams.. how to do them correctly?

Hello Brother I have an interesting solution for seams as this. Subdiv level 2 EdgeSplit with marked sharp edges Solidify with control of thickness and crease A further subdiv level 1 Only thing is that I results a non manifold mesh, that is it is the mesh actually split apart at seams. You can have somewhat of a solution but using the solidify modifier without “only Rim”… This will give inside faces as well. However with material index offset you can select these faces easily in later mode…

Now I’m trying to figure it out