Shrimple [shader]

A Minecraft Java shader that attempts to maintain a minimal "vanilla" aesthetic, while adding some optional features:

• Waving Plants.
• FXAA (anti-aliasing).
• Sharp/Soft Shadows.
• CSM (Cascaded Shadow Mapping). *
• Dynamic colored lighting. *
• Ray-Traced block-light shadows. *
• Volumetric fog lighting.
• Rain puddles & ripples.
• POM (Parallax Occlusion Mapping).
• Normal Mapping.
• Specular (shininess).

* Feature only available with Iris 1.6.0 or later!

Known Issues

• The technique I use for lighting has the advantage of being very fast for few lights, but can also be dead slow with a lot of visible/nearby light sources.
• Ray-traced block-light volumetrics are known to be incredibly slow. It's more of a cool looking gimmick than meant for gameplay.

FAQ

• Q: Why isn't block-lighting being ray traced?
  A: RT is off by default. Either change BLock Light > Mode to "Traced", or apply the "RTX" profile.

• Q: How do I remove the grainy noise from block-light shadows?
  A: Reduce the Block Light > Penumbra setting as needed, or to zero to completely disable temporal filtering. The "noise" is only needed for block-light soft shadows.

• Q: How do I make colored/dynamic/traced shadows work further from player/camera?
  A: You can increase the Block Lighting > Advanced > Horizontal/Vertical Bin Counts. Increasing the Bin Size option will also help, but it will educe the maximum "density" of light sources per area.

• Q: How do I make colored/dynamic/traced shadows faster?
  A: There are several options under Block Lighting > Advanced settings:

  • Reduce the Horizontal/Vertical Bin Counts to reduce the size of the light volume.
  • Reduce the Block Lighting > Advanced > Bin Size to use smaller bins (less blocks per bin).
  • Reduce the maximum number of lights per-bin.
  • Reduce the Range multiplier for lights.

Special Thanks

• Fayer: very extensive help with QA, support, repairs, and motivation.
• Builderb0y: help with optimized bit-magic supporting the core of voxelization.
• Bálint: Created the fancy Iris warning, as well as DDA tracing & bit-shifting madness.
• Tech: Helped implement improved soft shadow filtering & dithering.