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

★ 19,604C++Audience · developerComplexity · 3/5DormantLicenseSetup · moderate

Mindmap

mindmap
  root((repo))
    What it does
      Shader techniques
      Visual effects
      Graphics fundamentals
    Techniques covered
      Lighting models
      Normal mapping
      Reflections
      Post-processing
    Tech stack
      GLSL shaders
      Panda3D engine
      C++
    Use cases
      Learn shader basics
      Implement game effects
      Understand graphics
    Audience
      Game developers
      Graphics learners
      Beginners

mindmap root((repo)) What it does Shader techniques Visual effects Graphics fundamentals Techniques covered Lighting models Normal mapping Reflections Post-processing Tech stack GLSL shaders Panda3D engine C++ Use cases Learn shader basics Implement game effects Understand graphics Audience Game developers Graphics learners Beginners

Things people build with this

USE CASE 1

Learn how to write shaders that create realistic lighting and shadows in your own 3D game.

USE CASE 2

Implement visual effects like bloom, depth of field, and motion blur to improve your game's graphics.

USE CASE 3

Understand normal mapping and ambient occlusion to make surfaces look detailed without adding extra geometry.

USE CASE 4

Study shader concepts that transfer across game engines like Unity, Unreal, and Godot.

Tech stack

GLSLC++Panda3DOpenGL

Getting it running

Difficulty · moderate Time to first run · 30min

Panda3D and OpenGL dependencies need to be installed; shader compilation may require graphics driver setup.

Use freely for any purpose, including commercial use, as long as you keep the copyright notice.

In plain English

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.

Copy-paste prompts

Prompt 1

I want to add realistic lighting to my 3D game. Walk me through how Blinn-Phong shading works and show me a GLSL example.

Prompt 2

How do I make water look reflective and refractive in a game shader? Explain screen-space reflections step by step.

Prompt 3

I need to add a bloom effect (glow around bright lights) to my game. Show me the shader code and explain how it works.

Prompt 4

What is normal mapping and how does it make flat surfaces look bumpy without adding more geometry?

Prompt 5

I'm new to shaders. Explain what a vertex shader and fragment shader do, then show me a simple GLSL example.

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