Ultra Realistic PBR Shader Pack

Ultra Realistic PBR v1.0 — Initial Release

Welcome to the initial public release of Ultra Realistic PBR! This shader pack is built from the ground up to deliver next-generation physically based rendering, astronomical accuracy, and multi-dimension stability.

Key Highlights:

• Astronomical Celestial Engine: True 23.5° axial tilt sidereal rotation, dynamic solar system planetary orbits, and Milky Way dust absorption lanes.
• "Blue Marble" Earth in The End: Replaces the void with deep space vacuum and a photorealistic rotating Earth featuring dynamic cloud systems, ocean glints, and night city lights.
• Physical Fluid Optics & SSR: Beer-Lambert light absorption, domain-warped water waves, and real-time Screen-Space Reflections (SSR) across wet surfaces.
• Color Science & Soft Shadows: 12-Tap Poisson disk filtering with slope-adaptive depth biasing (flicker-free) and ACEScg filmic tone mapping.
• Native Multi-Dimension Pipelines: Fully isolated rendering passes across world0, world1, and world-1 for crash-free cross-dimension travel.

Compatibility:

• Tested and compatible across Minecraft 1.16.5 through 26.x via Iris Shaders / Oculus + Sodium.