I'm trying to add a groove to a model following lines from in-game textures. I used the cut tool to create the edges along the line, but when I try to extrude those edges to get a triangular groove I get this;
Before extruding
After extruding
I've done this on some other game models without issue, so I don't know why this model does this. Is there a better way to create theses sort of features?
