Amazing work! BTW I found on some models weighted vertex normals technique. Maybe you used quadchamfer or any others script or it could be classic normals but it looks like more weighted.
HA HA!!!! Very good question sir. We actually use an in-house script that we lovingly call the Auto-Normaliser. It actually breaks the vertex normal and manipulate them to our liking. but the tool does more than that. it remembers, forever, the selection of chamfer on a given assets, then, you can add or subtract from that…