New to sketch and spent 3 days trying to drape a path onto sloping terrain. It works fine until I try to add paint or materials. Then I can’t select the face without selecting the entire terrain. If I draw a simple path and drape it then I have no trouble at all and am able to select the path and paint it. I have used ‘weld’ and edges 2 to make the wiggly path simple with no gaps or messy lines but still no luck. The path has a face before I drape it. Would anyone have any ideas what could be wrong with my path?