But how to select some colors, which needs to be transparent, which have almost the same shade as the colors I need to show (not transparent)? Good example would be the mixed part of sand and grass which is just beside the tarmac? Example image: You can see some examples of tarmac and grass and whats in between, the mix of grass and sand. So lets say the starting image has part of tarmac and sand or brown soil. So what I need is to create half of sand or soil trandparent, but in not repetative way. How to make it so?