Frequency Separation Courses
Skillshare Creative Retouching Techniques in Photoshop
Skillshare Adobe Photoshop: High-End Skin Retouching
Skillshare The New Way of Doing Frequency Separation
Skillshare Photoshop Retouching for Beginners
Envato Tuts+ via YouTube Retouching Headshots
LinkedIn Learning The Skin Retouch
LinkedIn Learning Portrait Retouching on iPad With Affinity Photo
Envato Tuts+ via YouTube Dark Black Portrait Style - Affinity Photo Tutorial
Olivio Sarikas via YouTube Fine Art Photo Retouching and Editing in Photoshop - Tutorial Part 2
Adobe via YouTube