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Arc [shader]


A shader for Optifine & Iris that aims to providing realistic visuals with very minimal performance loss. Almost every effect/feature can be fine-tuned for the ideal balance between performance and quality. This project is still a very early work-in-progress, there is much work to be done.



  • HDR lighting
  • Volumetric lighting
  • Volumetric fog/smoke
  • Manual & Automatic exposure
  • Screen-space reflections
  • Water waves & refraction
  • Supports basic, distorted, and cascaded shadow mapping.
  • Depth-of-Field
  • Bloom

Also contains special support for PhysicsMod ocean waves & snow!



- World
- Materials
- Atmosphere
- Shadows
- Camera
- Effects
- Debug


Resource Packs

Supports LabPBR and OldPBR texture formats; The default setting for materials is "vanilla", which hard-codes a limited set of PBR material values for the original Minecraft textures.

The recommended resource pack is Patrix; when used make sure to set the shader setting for Material Format to "Patrix", as it uses a special combination of OldPBR and LabPBR formats.


Compatibility & Support

Fully compatible with Optifine & Iris. If you have any suggestions or requests, you can reach out to me on the ShaderLabs Discord.