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Faster Iris Shadow Mapper logo

Faster Iris Shadow Mapper

Mod

Improves the speed of Iris' shadow mapping

Type

Mod

Modrinth Downloads

557,358

Modrinth ID

nSRLvOHG

Last Updated

Sep 13, 2026

Description

⚠️ This has been included in Iris 1.11.2, it is now only useful for older MC versions or for forks like oculus ⚠️

Faster Iris Shadow Mapping is a really lightweight mod that prevents unneeded things from rendering during the shadow pass.

This project does not replace Iris, both needs to be used at the same time for it to work.

This mod also works with oculus.

How it works

During the shadow pass, for opaque models, the color of the model won't have any visual change, a blue car and a red car both cast the same shadow, no matter their color. So what this mod does is it prevents things like the text on signs, the banner patterns, the enchantment glint etc from rendering during the shadow pass. It only improves performances when some of those are visibles.

Performance showcase

Small base in a flat world (26.1.2 - 1.0.0)

  • +10% FPS

A lot of signs and banners (26.1.2 - 1.0.0)

  • +50% FPS on average
  • +1000% FPS on 0.05% low
  • The signs have text on them but on the other side

Modpacks

Feel free to use this mod in your modpacks without asking for permission.

Compatibility

Mod Loaders

Fabric Forge Neoforge Quilt

Game Versions

1.20.1 1.21 1.21.1 1.21.2 1.21.3 1.21.4 1.21.5 1.21.6 1.21.7 1.21.8 +7 more

Recommended Gear

Affiliate

Hardware and extras that pair well with this mod.

LEGO Minecraft Set

LEGO Minecraft Set

Official sets that translate the building side of the game off-screen.

View on Amazon →

As an Amazon Associate I earn from qualifying purchases.

Screenshots

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Included in Modpacks (54)

Show fewer
Sodium Plus Sodium Plus Keo optimized Keo optimized Rapid Optimization Rapid Optimization Sensible MC Sensible MC Keo Vanilla Keo Vanilla Voxyris Voxyris Shaders - Working Shaders - Working Void's essentially optimized pack Void's essentially optimized pack Simple Performance Simple Performance Elden Kingdom Elden Kingdom Azure Visuals Azure Visuals Oxygen Oxygen SF Integrated Modpack SF Integrated Modpack The Stuff of Legend The Stuff of Legend SimplyVanilla SimplyVanilla Kuri's FreshVanilla Kuri's FreshVanilla Better fps than vanilla and optifine Cherry Cherry SIMPLY: Survival SIMPLY: Survival BasicPackage BasicPackage Simplicity Refabricated: Vanilla+ Simplicity Refabricated: Vanilla+ Quick Vanilla+ Quick Vanilla+ GalleyRP Askalon GalleyRP Askalon Beta Decay Beta Decay Infinity Infinity Sirius Sirius Vircraft Modpack Vircraft Modpack Uniquely Optimised Uniquely Optimised Avalore (Modpack) Avalore (Modpack) MiraOptimizer✨SODIUM MiraOptimizer✨SODIUM Vanilla's Finest Vanilla's Finest Create: Sable Create: Sable Slemprix's Essentials Slemprix's Essentials Sherbert Sherbert Commands Pack Commands Pack EdonMe Survival EdonMe Survival Phantasmagoria Phantasmagoria Vanilla Expanse BetterVanilla SMP ModPack BetterVanilla SMP ModPack The Real New World The Real New World Glatzencraft Glatzencraft SIMPLY: Vanilla SIMPLY: Vanilla Comfortable survival Comfortable survival Create: Horizons Create: Horizons Reoxx Optimized Reoxx Optimized Smolder's Ultimatum Smolder's Ultimatum The Vanilla Experience The Vanilla Experience Voidbound Chronicles Voidbound Chronicles Common-Arcadia - Next Gen Common-Arcadia - Next Gen Liye Liye Vanilla++ Vanilla++ Expanded Adventures: Vanilla+ Expanded Adventures: Vanilla+ Fabricated Fabricated X-Factor Optimization X-Factor Optimization

External Resources

Modrinth Source Code Issues