lettier/3d-game-shaders-for-beginners

3D Game Shaders for Beginners is a step-by-step tutorial guide explaining how visual effects work in 3D games and how to implement them yourself. Shaders are small programs that run on the graphics card and control how pixels are colored on screen, they are what gives modern games their realistic lighting, shadows, reflections, water effects, and cinematic post-processing. This guide walks through a wide range of shader techniques with clear explanations aimed at someone learning the fundamentals. The techniques covered include texturing, multiple lighting models (Blinn-Phong, cel shading for a cartoon look, rim lighting), normal mapping (making flat surfaces look bumpy without adding geometry), ambient occlusion (the soft shadows that collect in corners and crevices), depth of field (the blur you see on out-of-focus objects), bloom (the glow around bright light sources), screen-space reflections and refractions, fog, motion blur, chromatic aberration (the color fringing from a lens), and many more. Each section is its own file in the repository. The examples are built with the Panda3D game engine and written in GLSL (OpenGL Shading Language), the programming language used to write shaders for OpenGL. However, the author explains the concepts in a way that transfers to other engines and graphics APIs like Unity, Unreal, or Godot. The accompanying code includes C++ for scene setup and .vert and .frag shader source files. Someone would use this as a self-study resource when they want to understand and implement high-quality visuals in their own game project.