lighting studies - i kinda understand which plane should be lighter or darker but i cant tell how light or dark it should be, had to rely alot on reference photos :
An Artist's Reference Guide To: Lighting The Face - Volume One eBook : Jean, Amanda: Amazon.co.uk: Kindle Store
edgebug's art reference blog!! — drawingden: Face Lighting by Duff allo
Head and Face Reference - Anatomy 360
Face Lighting Reference - Female and Male Heads - YouTube
Character Design References - “Portrait Lighting Reference” by Gabriel Picolo* • Tutorial of the Day | bit.ly/3mAkwZI • CharacterDesignReferences.com 🤖 #CharacterDesign #Tutorials #HowToDraw #Animation | Facebook
PIXLS.US Blog - Portrait Lighting Cheat Sheets
Portrait Lighting Guides – Thomas Schmall
Head References for Artist – Lighting – Art of Wei
400+ Portrait Lighting Digest & Facial Emotions | S3ART Store
Head Lighting Reference Sheet by robertmarzullo on DeviantArt
A Helpful Guide to Shading and Lighting by HeroDraws - Make better art | CLIP STUDIO TIPS
Head References for Artist – Lighting – Art of Wei
Lighting Reference | 26 best free lighting, portrait, person and human photos on Unsplash
How to Art — Male facial light study by CharlieKirchoff