https://imgur.com/a/Bt5NTBT What are these? What causes them to appear? What use do they have? How do I hide them? They show up randomly, and automatically hide themselves in 3D Shaded Textured Polygons view if I'm away and not selecting the brush. Other views like Wireframe have them showing up even if the brush isn't selected. Thanks for taking the time out of your day to respond, if you do, and have an absolutely splendid day. Sincerely, an inexperienced mapper.