Per-Fragment Spotlight Effects in OpenGL - YouTube
opengl - How can I change my fragment shader to allow 2 more spotlights? - Stack Overflow
Spotlights · LegacyOpenGL
Modern OpenGL 08 – Even More Lighting: Directional Lights, Spotlights, & Multiple Lights — Tom Dalling
Simulating a spotlight | OpenGL 4 Shading Language Cookbook, Second Edition
opengl - How to create a 2D spotlight? - Stack Overflow
LearnOpenGL - Light casters
7.2: Lighting and Material - Engineering LibreTexts
Glow/Spotlight shader not working on OSX/Android/iOS (OpenGL) - Unity Forum
Extensible 3D (X3D), ISO/IEC 19775-1:2013, 17 Lighting component
LearnOpenGL - Light casters
Visualization Library: Directional, Point and Spot Lights Tutorial
opengl - Shader for a spotlight - Stack Overflow
Tutorial 21 - Spot Light
Implementing per-fragment spot light | OpenGL Development Cookbook
Per-pixel spotlight shader - Game Engine Support and Discussion - Blender Artists Community
Spotlight Shadows
LearnOpenGL - Light casters
LearnOpenGL - Light casters
opengl - GLSL spotlight projection volume - Stack Overflow
Introduction to Computer Graphics, Section 7.2 -- Lighting and Material
opengl - GLSL spotlight projection volume - Stack Overflow
GLSL Tutorial – Spotlights » Lighthouse3d.com
