This video shows you how to modify the brightness and / or colour of all layers in your stack at once.
Links to my courses:
The Art of Video Games
https://www.udemy.com/course/the-art-of-video-games/?couponCode=AUGUST2135B23BEA2B74
The Art of Substance Painter
https://www.udemy.com/course/learn-the-art-of-substance-painter/?couponCode=AUGUST2175CC8DF1CF24
The Art of ZBrush
https://www.udemy.com/course/learn-the-art-of-zbrush/?couponCode=AUGUST212E5D5CBA6179
The Art of Level Design
https://www.udemy.com/course/learn-the-art-of-level-design-part-1/?couponCode=AUGUST21ACDFDC3A2504
