Requires Iris 1.8+

Improvements

Major lighting improvements
- Different types of light are now mixed in a more realistic manner
- Indexed block light now uses proper BRDF lighting calculations on solid geometry, and an inverse-square law-based falloff
- The Level Of Detail system now uses hashed world-space position modulo LOD, instead of vertex ID modulo LOD level
  - This means light sources will be more evenly distributed, and also allows for a LOD of zero close to the player, meaning no lights (except lava) should ever be invisible close up
- Global index deduplication now takes full advantage of maximum supported work group size
- Local index culling now uses player-eye-space Manhattan distance and view-space Euclidean distance instead of Chebyshev distance, for even more aggressive culling
- Index Distance is now a cube instead of a sphere
  - This fully utilizes all representable positions in light index storage
SMAA (Enhanced Subpixel Morphological Antialiasing) 1x is now fully implemented, based on SMAA-MC
- This is always enabled by default, replacing the old FXAA implementation
Faster code paths making use of various optional GLSL extensions have been added
- 16/8-Bit Types
- 32×16-Bit Multiplication
- Trinary Min/Max
- These can be controlled in the Compatibility shader options menu
  - Please let me know if the shader pack fails to compile with the default values

New Features

Fog is now a cylinder, increasing visibility and matching Vanilla
- Clouds now also use a square fog to be visible further away
Light Level Visualization now disables Indexed Block Light