Small bits of cured resin will cause that as well as bubbles, double check your resin and try to push the bubbles to the side. I mix what I have in the resin tray really really slowly with the scraper and it made a big difference in my prints.
Small bits of cured resin will cause that as well as bubbles, double check your resin and try to push the bubbles to the side. I mix what I have in the resin tray really really slowly with the scraper and it made a big difference in my prints.