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Resources / Mods / Polydium

Polydium

Miscellaneous client-side optimization mod

ModsFree1.21 – 26.x
by Wyvest · listed from Modrinth
Download › Install with the launcher

Opens Modrinth · 35 downloads there

What it does

Miscellaneous client-side optimization mod

Polydium is a resource made by Wyvest. It supports Minecraft 1.21 – 26.x. It has been downloaded 35 times on Modrinth. The last update came out on Oct 14, 2026.

Supported versions

26.x1.21

Release history

Polydium has had 72 releases on Modrinth since Oct 12, 2026. 72 of them came out in the past year. The newest is v1.0.6, released on Oct 14, 2026. It is made for Minecraft 26.3. It runs on Fabric. The download is 547 KB.

VersionReleasedMinecraftType
v1.0.6Oct 14, 202626.3Release
v1.0.6Oct 14, 202626.2Release
v1.0.6Oct 14, 202626.1, 26.1.1, 26.1.2Release
v1.0.6Oct 14, 20261.21.11Release
v1.0.6Oct 14, 20261.21.10Release
Description from the author on Modrinth

Polydium

Miscellaneous client-side optimization mod built by Polyfrost. On average, adding Polydium alongside the OneClient modpack improves average FPS by 20%.

The magic of this mod is how it works with other mods. Polydium works the best alongside Sodium, using its infrastructure to improve performance in mods such as 3D Skin Layers.

Notable features:

  • Global text width caching
  • 2nd occlusion culling pass
  • When Minecraft is GPU-bound, Polydium runs an additional occlusion pass on top of Sodium's occlusion culling which relies more on the CPU.
  • Can help especially on integrated graphics or intense worlds
  • Batched particle rendering, writing whole particle layers straight into the vertex buffer
  • Particle section culling, skipping particles in chunk sections Sodium has already culled
  • Faster entity, item, and text vertex writing through Sodium's vertex pipeline
  • GUI item baking, redrawing animated items only when their animation actually moves
  • Deferred sky, drawing the sky after terrain so hidden sky pixels are skipped
  • Cached block entity lighting, entity cull boxes, and entity shadow lookups
  • Faster startup and resource reloads through shader, pipeline, and resource pack caching
  • Optimizations for the new Vulkan backend
  • F3 debug screen caching, refreshing entries on an interval instead of every frame

Written by Wyvest. Read it with pictures on Modrinth.

How to install Polydium

  1. This mod runs only on your own game. Servers do not need it, so you can use it on any server.

  2. Install Fabric for Minecraft 1.21 – 26.x.

  3. Add the mods it needs: Fabric Language Kotlin, OneConfig and Fabric API.

  4. Download the .jar file from Modrinth and put it in the mods folder of your .minecraft directory.

  5. Start Minecraft with the Fabric profile.

  6. With the CraftRank Launcher you can skip these steps: open Mods, search for Polydium and click Install.

Compatibility

Minecraft versions
26.x, 1.21
Runs on
Fabric
Where it runs
Client only (your game)
Edition
Java
Needs
Fabric Language Kotlin, OneConfig, Fabric API
License
Free to use
Price
Free
Upkeep
Actively updated (Nov 10, 2026)

Polydium compared with similar ones Compare all alternatives

ResourceDownloadsVersionsLast updatePrice
Polydiumthe one you looked at351.21 – 26.x27 days agoFree
LazyRAMZappyix811.21Sep 8, 2026Free
Lithiumjellysquid3142.4M1.16 – 26.x12 days agoFree
BadOptimizationsthosea47.8M1.19 – 26.xSep 16, 2026Free

Questions

Does Polydium work on Minecraft 26.x?

Yes. Polydium supports Minecraft 26.x. All supported versions: 26.x, 1.21.

Is Polydium free?

Yes. Polydium is free to download from Modrinth.

Is Polydium client-side or server-side?

Client-side. Polydium goes in your own mods folder and works on any server, including servers without mods.

Does Polydium need anything else?

Yes: Fabric Language Kotlin, OneConfig, Fabric API. Install it before Polydium.

Is Polydium still updated?

Yes. The last update came out in the past day.

What are the best alternatives to Polydium?

The closest ones are LazyRAM, Lithium and BadOptimizations. Compare all alternatives

Alternatives to Polydium

LazyRAMMods · 1.21

Automatic client-side RAM optimization through deduplication, compact memory structures, adaptive cache cleanup and Deep AFK mode.

Free81 downloads
LithiumMods · 1.16 – 26.x

No-compromises game logic optimization mod, useful for both single-player games and multi-player servers.

Free142,428,005 downloads
Compare all alternatives ›

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