Yes, this is very old school. I used to do this years ago in Max long before S Painter. I would use blended box mapping for a tiling material and project planar uvw mapping modifiers to be painted in PS over a UV snapshot to different uvw channels for unique texturing detail.....thank you Allegorithmic.
That workflow is ancient and completely superceded by 3D texturing. Basically you have a tiling texture on 1 uvw channel and then you align the orthographic viewport to 6 sides of the model, taking a snapshot/screenshot each time and painting over that in Photoshop. Then you project each of the 6 sides(detail layers you…