I tried using the same World Projection method to make a material that will wrap around any tunnel surface, regardless of surface direction. I think I'm getting close to a good solution, but the blending is very awkward on surfaces that are not close to parallel with the XY, YZ, or XZ planes... I'll have to figure out how…
Thank you for the thorough explanation. :poly121: I figured out why it wasn't working for me. When I tried to emulate bbox's material I mistook the "Object World Position" node with the "World Position" node. But now it works with my new setup: So literally, all the material does is project the texture down from an…