I'm getting these odd stretched lines when baking a glowy PBR material to a texture file. As you can see on the render preview, these lines do not exist on the model itself and do not correspond to verts/edges/faces that exist during the bake.
Things I've tried without success: changing UV projection options, adding/subtracting margin on the UVs, adding/removing seams, trying GPU & CPU computation, disabling AO/emit/etc, and changing scale of UV image.
I'm new to UVs and am very much out of ideas on my end.