I'm designing a shirt and I want a nice even stripe around the edges. My first approach was to draw the stripe on the UV map. But I saw a model designed by someone more experienced where the edges of the shirt were actually a different material. This seems like a cleaner, more flexible solution. (Eventually I'll bake down to a single texture map.)
So what I want to do is select the neck hole and arm hole and create a new edge loop, pulling it back to create a border. Unfortunately this doesn't seem to be working. It seems like existing vertices close to the edge of the shirt are preventing me from making a new loop there (I can make one, but very narrow). I'm guessing here but maybe the edge loop would cut some of my quads into n-gons and Blender doesn't want to do that. I can extrude and get what I want, but that requires actually extending the geometry. I just want new faces on the existing shape that create an even ring around the openings.
Ideas? What I'm thinking is I have to delete a bunch of existing edges to make room around these holes, THEN make the new edge loops, and then add additional cuts as necessary to get back some geometry in the middle of the shirt. But I was hoping there's a less manual way to do this.