Mby someone can explain how to make these strings on the couch
Look up stitching alpha brushes for blender. This is done with sculpting.
In the last part he talks about how he did it on the shoe with textures.
Couldn’t you make the stitches using curve objects along the surface to get the same effect?
When it comes it texturing, you only need to assign all the curves a separate material… also you wouldn’t need to have loads of polygons for such a small detail.