AETHER REALISM ULTIMATE — Minecraft 26.1.2 / Fabric / Iris

Design goals
- Preserve Minecraft texture atlases and alpha-cutout plants.
- Real-time sun shadows with adjustable PCF softness.
- Semi-clear water using fixed-function depth testing (no unsafe depth sampling in gbuffers_water).
- Animated leaves, grasses, vines, kelp and small flowers with matching shadow motion.
- Natural Overworld sky and restrained post-processing.
- Custom 8-phase cratered moon atlas.
- Nether: bright self-lit lava, richer red colors, a final-pass lava halo active in every profile, and adjustable orange lava ambience.
- End: procedural galaxy, nebula bands and colored deep-space stars.
- Distant Horizons terrain and dedicated DH water integration with separate LOD-safe rendering.

Recommended starting profile: MEDIUM.
For debugging in Iris: Ctrl+D, restart Minecraft, then check the first shader compilation error if present.
