I'm getting into environment art, and I was wondering how professionals go about stitching a 3D level together, specially walls, floors and ceilings. I'm not looking for software specific solutions (although if you're using UE4 or Substance, it will help). For example, do you you make a square wall tile and clone that…
Modular sets don't necessarily need to be based on "squares" and "tiles" One thing that might help you answer your own question is to take your reference or concept image and draw over it with colored lines to highlight objects you perceive as modular or could be made modular. Look for things that appear they fit together…