IterationT Shaders (1.21, 1.20.1) is an impressive shaderpack for Minecraft that introduces a host of atmospheric enhancements. This shader pack can completely transform your Minecraft world into a hyper-realistic scene. I can assure you that you’ll be amazed and astonished when experiencing this shader. To truly appreciate its beauty, you’ll need a high-performance computer and a powerful graphics card. In my opinion, this is one of the most impressive shaders of 2024.
Features:
Atmospheric System
- Brand-new Sky Appearance: Introduces a completely new sky appearance through updated models.
- Comprehensive Planetary Atmosphere Simulation: Provides a full-fledged simulation of planetary atmospheres.
- Physically Modeled Rendering of Celestial Bodies in the Atmosphere: Renders celestial bodies based on physical models.
- Volumetric Cloud Adjustments: Fine-tunes volumetric cloud rendering.
- Ground Scattering Adapted to Atmospheric Models: Adds ground scattering that aligns with the atmospheric model.
Global Illumination System:
- Enhanced global illumination details and color representation.
- Eliminated block edge artifacts.
- Improved transitions when out of range.
Underwater Rendering:
- Adjusted water fog.
- Rewritten underwater volumetric lighting.
- Fine-tuned caustic effects.
Volumetric Fog:
- Softer volumetric fog appearance.
- Optimized lighting weights.
- Added options for refraction during rendering.
- Reduced visibility of noise patterns.
End Dimension:
- Added celestial bodies (black holes).
- Introduced star ring projections, dynamic skies, and gravitational lensing.
- Adjusted exposure and shadow quality.
Nether Dimension:
- Enhanced ambient fog, reduced jitter.
- Compatibility with Biomes O’ Plenty extended biomes.
Material System:
- New parallax algorithm.
- Added anisotropic filtering support.
- Included PBR self-illumination.
- Optimized wet effects.
Weather System:
- New raindrop rendering, snowflake detection.
- Adapted rain effects to the new atmospheric model.
Post-Processing:
- Added lens flares.
- Rewrote bloom algorithm.
- Adjusted exposure logic.
Cave Mode:
- Significantly improves visibility in dark caves when enabled (right side).
Other Features:
- Custom adjustments for multiple light sources.
- Tweaked sky illumination curves and block light levels.
- Fine-tuned various light source intensities.
- Added Nether ambient lighting and fog settings.
- Adjusted shadow base blur and introduced custom options.
- Enhanced shadow quality and added related options.
- Tweaked plant subsurface scattering.
- Automatic texture pack resolution detection.
- Compatibility options for modded blocks.
- Refined water wave appearance and added custom options.
- Adjusted block specular intensity.
- Added underwater fog rendering after transparent blocks.
- Multiple customizable rain options.
- Toggle for underwater volumetric fog.
- Horizon switch for sky and reflected skybox.
- Improved metal sky reflection occlusion transitions.
- Added fine snow mist and magma fog, closely resembling the original.
- Altered blindness effect to match the original.
- Updated fog distance calculations for most effects.
- Tweaked night vision.
- Optimized depth of field sampling.
- Auto-weight mode for exposure brightness.
- Adjusted default auto-exposure modes for each dimension.
- Added blackout option.
- Tweaked darkening effect and introduced related custom options.
- Added startup title.
- Special rendering effects for End Portal.
Bug Fixes:
- Transparent flag transparency loss.
- Handheld flag transparency loss.
- Unrendered snowflakes.
- Missing lightning rendering.
- Enchantment glint rendering error.
- Disappearing transparent blocks.
- CTM overlay causing incorrect transparency rendering.
- Specular maps interfering with raindrops.
- Missing grass sway in tall grass.
- Render error when disabling “specular maps” or “normal maps.”
- Tiny normal offset errors.
- Render glitch when normals point directly upward.
- Block boundary rendering issues.
- Unrendered hitboxes.
- Fishing rod lines not rendering.
- Missing redstone line glow.
- Overly bright blaze textures.
- Black bands in reflections on completely smooth surfaces.
- Abnormal water fog layers for transparent blocks.
- Incorrect day-night transition times.
Screenshots:
Requires:
Optifine HD or Iris Shaders
How to install:
- Please visit the following link for full instructions: How To Download & Install Shaders with OptiFine
IterationT Shaders (1.21, 1.20.1) Download Links
For All Versions from Minecraft 1.7.10 to Minecraft 1.21, 1.20.6, 1.20.4, 1.20.1
v2.0.0: Download from Server 1 – Download from Server 2
v3.0.0: Download from Server 1 – Download from Server 2
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