Having Luminosity Masks as an action in your Photoshop arsenal for precise selections within your image to make blended adjustments along with digital blending with multiple images is a valuable tool to have. This class incudes four segments: Introduction, Creating Luminosity Masks, How To Use Luminosity Masks In Photoshop, Digital Blending Using Luminosity Masks In Photoshop. You need to shoot raw to use Lumisosity Masks.