Minecraft wiki entry for Shaders, associated text: 1 Java Edition
1.1 Core shaders
1.1.1 List of core shaders
1.1.2 Non-rendertype
1.1.3 Rendertype
1.2 Include shaders
1.3 Post-processing shaders
1.4 Render process
1.5 File format
1.5.1 Render program
1.5.2 Render pipeline
1.6 Tutorials and useful docs
2 Bedrock Edition
3 History
4 Issues
5 References