When considering the shape of your light, it's essential to remember that the absence of light is just as important as the prevalence of light.
We want to choose where shadows fall and what shapes they take.
13 Film Lighting Techniques Every Filmmaker Should Know
Virtual Production Essentials: 10 Things to Know Before You Start Shooting
Chapter 8.5: Character Lighting - Chris Brejon
How to Create Suspense with Lighting
The Anatomy of Light and Shadow – Brush Volt
A Guide to RGB Lighting
Shaping with Light: Cinematography Techniques
Advanced Cinematography
Film Lighting Basics: Motivate Your Scene and Your Audience Through Direction — Zacuto
Cinematography Technique: Cutting Light and Creating Shadow