If this is the first time you’ve heard of frequency separation, prepare to be amazed! Thank you to the guys at Phlearn.
I’ve shared a number of tutorials from Phlearn over the last 12 months, because I believe Aaron Nace is one of the best re-touchers in the world. That’s why I love their Photoshop courses. If you’re looking to push your Photoshop knowledge even further, I can’t recommend them enough: Phlearn Photoshop Courses