I just started working with Affinity Photo from Paintshop Pro. I am an ammeter, but reasonably good at photo editing. Anyway, I don't even know if it is possible, but after trying everything to bring this subtle rainbow out in the background layer, and it seems like experimenting with the threshold gave me the best result. The rainbow is too faint for the selection brush to work and thus if I try to select and saturate it effects too much of the sky. The threshold adjustment seems to have produced a pinkish hue in the highlights in the background and I was going to select it and play with the highlights with the HSL adjustment, but I thought I'd take a shot and ask. Thanks in advance for any advice.
us and rainbow post.afphoto