Masking different layers based on brightness is an often tricky but vital Photoshop skill to have. There’s a bunch of different ways of doing it from the simple to the advanced. Two of the most common methods are by using Luminosity Masks or with Photoshop’s “Blend If” layer options.
While the two might appear to do similar things on a quick glance, there are some pretty distinct differences between the two. Black Rudis from F64 Academy looks into both methods to show us how they work. Each has advantages over the other depending on what you’re trying to achieve. And both will let you do things that the other simply cannot.