IterationT Shaders (1.21.1, 1.20.1) – The Best Realistic Graphics in 2024

IterationT Shaders (1.21.1, 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, 1.20.1) Download Links

For All Versions from Minecraft 1.7.10 to Minecraft 1.21.1, 1.21, 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