R-T-S

What is the R-T-S Shader? It is a shader pack that attempts to simulate complex global illumination techniques. Unlike traditional shaders that rely on simple rasterization, R-T-S calculates light paths more realistically within the game engine.

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Обновлён: 6 июля 2026 г.
Лицензия: Apache-2.0

Опубликован 16 июня 2026 г.

Key Features Global Illumination: Light bounces off surfaces to illuminate areas without direct sunlight (such as caves or building interiors), effectively eliminating flat, pitch-black shadows.

Real-Time Ray Tracing: It calculates light paths to create soft shadows (penumbras) that change size based on the distance from the light source.

Realistic Reflections (Screen Space Reflections): Surfaces like water, metal, or polished blocks accurately reflect their surroundings, including the sky, clouds, and nearby blocks.

Dynamic Atmosphere: Features atmospheric scattering, volumetric fog, and "god rays" (light beams piercing through trees or clouds).

PBR (Physically Based Rendering) Support: It is compatible with resource packs that include normal, specular, and roughness maps, giving blocks realistic volume, shine, and texture.

Technical Requirements & Considerations To run this shader effectively, keep the following in mind:

Hardware Demands: Because Ray Tracing is computationally intensive, this shader requires a mid-to-high-end GPU to maintain a stable frame rate.

Dependencies: You must have OptiFine or, more highly recommended, Iris Shaders (paired with Sodium) installed to manage the shader files.

Optimization: Performance can be fine-tuned via the shader’s internal settings menu (Options > Video Settings > Shader Packs > Shader Options) to balance visual fidelity with performance.

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1.0.4Релиз1.20.1, 26.2 · 6 июля 2026 г.

This is a massive overhaul of the shader pack. Almost the entire rendering pipeline was rewritten to add a big batch of new features. Compatible with Iris and OptiFine, Minecraft 1.20.1 and current versions.

New features

Global Illumination (screen-space approximation) + hemisphere sky/ground ambient bounce lighting Screen-Space Ambient Occlusion (SSAO), denoised/blurred Real screen-space reflections (SSR) on water — reflects actual terrain, not just a fake sky color Volumetric fog / light shafts (ray-marched against the shadow map) Improved water/hydrodynamics: Gerstner-style waves, shoreline foam, rain ripples Bloom (proper two-pass blur) + Tone Mapping (Reinhard / ACES / Filmic) + Exposure control Depth of Field and Motion Blur Immersive weather: wet surfaces with rain, extra fog/ripples when raining Celestial phenomena: aurora borealis, twinkling stars, shooting stars, sun/moon halo Render-distance pop-in fade ("geometry fade") to hide chunk edge culling Visual style presets: Vibrant, Cinematic, Realistic, Nocturnal, plus the usual quality tiers (Potato → Super Ultra)

Known issues (being worked on)

Water: reflections can still look inconsistent or "mosaic-like" over complex geometry (waterfalls over stairs, many overlapping blocks). A fix was applied but it's not 100% perfect yet in every scenario. Player hand / entities / dropped items: since these are rendered through a different pipeline stage than terrain, some post-processing effects (motion blur, ambient occlusion) can occasionally cause them to look slightly off (too dark, semi-transparent, or affected by leftover data from a previous frame). Several fixes have been applied, but if you still notice glitches specifically on the hand, mobs, or other players, please report it with a screenshot.

Notes

This pack does not use real hardware ray tracing (RTX) — GLSL 1.20 (the language OptiFine/Iris shaders run on) doesn't support compute shaders or BVH acceleration structures. "Ray tracing" here refers to ray-marching techniques (SSR, volumetric light shafts), the same approach used by other well-known Minecraft shader packs. If you hit a shader compile error or a visual bug, a screenshot + which profile you're using helps a lot to track it down.

1.0.3Релиз1.20.1, 26.2 · 27 июня 2026 г.

Version 1.0.3 (Full Release)

Thank you so much for 300 downloads!

Changelog:

Fixed: Torch light (handheld/dynamic light) is now fully fixed and working perfectly again.

Added: Sun reflections on water! Water surfaces now realistically reflect the sun.

Note: This is a stable, full release. We are officially out of beta!

1.0.3Бета1.20.1, 26.2 · 24 июня 2026 г.

Added: Shadow configuration options-Celebrating 200 Downloads!.

Known Issue / Bug: Torch lighting (emissive/dynamic light) is currently not working in this build.

Note: This is a beta release focused on the new shadow settings. The torch bug will be fixed in the next update

1.0.2Релиз1.20.1, 26.2 · 21 июня 2026 г.

Version 1.0.2 - Celebrating 107 Downloads!

Added: Shadows are now officially implemented.

Added: You can now toggle shadows on and off in the settings.

Added: The sky is now configurable.

Fixed: Resolved several bugs related to water rendering.

Known Issues: There is currently a lighting issue when holding a torch in the hand, making it obsolete for now.

Coming Soon: We will be focusing heavily on performance optimizations for future updates.

1.0.1Релиз1.20.1, 26.2 · 20 июня 2026 г.

Fixed: Resolved a bug where the ground/dirt was incorrectly moving. The wind animation now correctly applies only to the trees.

Fixed: General bug fixes and stability improvements.

1.0.0Релиз1.20.1, 26.2 · 20 июня 2026 г.

Added: Implemented the new graphics settings system, allowing you to choose between different quality presets (such as Low, Medium, High).

Added: Added a dynamic wind movement effect for tree leaves.

Known Issues: There are still some graphical bugs with shadow rendering that we are working to resolve.

Coming Soon: Major performance optimizations. We are aware of a recent performance drop (around 90 to 100 FPS) and are focusing on code optimization for the next update.

0.1.1Релиз1.20.1, 26.2 · 18 июня 2026 г.

Fixed: Resolved an issue where the sky rendering was not displaying correctly.

Known Issues: Currently, there are some graphical glitches regarding shadow rendering. We are aware of this and working on a fix for the next update.

Coming Soon: We are working on a new settings system that will allow you to choose between different quality presets (Low, Medium, High) to optimize performance for your specific hardware. Fixed: Resolved an issue where the sky rendering was not displaying correctly.

R-T-SРелиз1.20.1, 26.2 · 16 июня 2026 г.

Finally here: R-T-S for 1.20.1!

We’ve officially updated the R-T-S Shader to work seamlessly with Minecraft 1.20.1. Whether you're exploring the Trails & Tales features or building massive projects, your world will look better than ever with our signature ray-traced lighting and realistic reflections.

What’s new?

1.20.1 Compatibility: Perfectly integrated for the newest version.

Better Performance: We’ve tightened the code to ensure higher FPS while maintaining that cinematic look.

Visual Tweaks: Polished lighting transitions and better water transparency.

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