I'm writing about decals in the context of substance painter meaning these details get merged onto the final texture. It was done by projecting the image in substance painter.
Here is the blockout In the past I always kept the polycount far too low because I try to be as efficient as possible but that always results in curved surfaces looking too angular even after baking the high poly. So I made sure the curved surfaces have enough. Once I had finished that I decided I would go a little crazy…