Thallium

Name: Thallium
Price: 8 EUR
Author: Raixu27

Yet another modpack that adds many client-side features/tweaks while increasing performance and remaining compatible with vanilla servers.

by Raixu27

150 Downloads

0 Followers

fabricMC 1.21.11optimization

Rent Thallium Server

Screenshots

About this Modpack

Thallium

Thallium is yet another modpack that adds many client-side features/tweaks while increasing performance, remaining compatible with vanilla servers and frequently updating.

Thallium is 100% compatible with vanilla worlds, servers and mechanics.

There are 15 competing standards.

Mods marked with ⭐ are considered important or extra good.
Mods marked with ⚠️ could get you banned from servers that disallow that mod.

Features

3D Skin Layers: Makes skin layers render in 3D.
⭐ AppleSkin: Provides information about food and shows your saturation.
Armor HUD: Shows information about your armour on the HUD.
Better Mount HUD: Improves the HUD when riding an entity.
Better Statistics Screen: Improves the statistics menu.
Blur+: Improves the vanilla blur effect.
Chat Animation: Adds an animation when chat messages appear.
Chat Heads: Shows the player's head next to their chat messages.
Cherished Worlds: Allows you to favourite/pin worlds and servers.
⭐ Controlling: Adds a search bar to the key binds menu.
Cubes Without Borders: Allows you to play in borderless/windowed fullscreen mode.
⭐ Distant Horizons: Allows you to see very far but is disabled by default.
Enchantment Descriptions: Adds descriptions to enchantment books.
facebar: Adds the player's head on the locator bar instead of boring colours.
⚠️ Full Brightness Toggle: Adds the ability to press F7 to toggle fullbright.
⭐ Inventory Profiles Next: Adds inventory sorting.
Language Reload: Redesigns the language menu and improves the performance of loading languages.
Make Bubbles Pop: Makes bubbles pop when they reach the surface of the water.
Model Gap Fix: Removes tiny gaps that you can see in items when you're holding them.
More Chat History: Allows you to scroll up in the chat.
Mouse Tweaks: Makes it easier to move items in the inventory with the mouse.
⭐ Resourcify: Adds the ability to download resource packs, shader packs and worlds from Modrinth and Curseforge in-game.
Server Country Flags: Shows what country servers are located in inside of the multiplayer menu.
⭐ Shulker Box Tooltip: Allows you to see the contents of a shulker box without placing it down.
Sound Physics Remastered: Makes sounds more realistic.
Status Effect Bars: Adds progress bars to status effects to see how long they will last.
⭐⚠️ ViaFabricPlus: Allows you to join servers on older versions of Minecraft.
⭐⚠️ Xaero's Minimap: Adds a minimap to the top left of your screen that can be toggled with Right ALT.
⭐⚠️ Xaero's World Map: Adds a fullscreen map that you can open by pressing M.

Features from OptiFine

Capes: Allows you to use capes from OptiFine, LabyMod and MinecraftCapes.
Continuity: Adds support for OptiFine's connected textures, emissive textures and custom block layers.
Cull Leaves: Adds the Smart Leaves feature from OptiFine. Use Puzzle to enable this.
Entity Model Features: Adds support for OptiFine's custom entity models.
Entity Texture Features: Adds support for many custom entity texture features.
⭐ Iris Shaders: Adds support for shader packs.
LambdaBetterGrass: Adds OptiFine's better grass. Use Puzzle to enable this.
⭐ LambDynamicLights: Adds OptiFine's dynamic lights. Use Puzzle to enable this.
Optiboxes: Adds support for OptiFine skies.
OptiGUI: Enables customisation of GUI with resource packs
⭐ Puzzle: Adds a button in the options screen to configure mods that add OptiFine features.
⭐ Zoomify: Adds the ability to hold C to zoom in.

Performance Mods

Clumps: Groups XP orbs together.
Concurrent Chunk Management Engine (C2ME): Uses multiple CPU threads to improve the speed of chunk generation.
Dynamic FPS: Reduces Minecraft's resource usage while Minecraft isn't focused.
Entity Culling: Stops entities that can't be seen from being rendered.
Fast IP Ping: Improves speed of pinging servers when using a literal IP address.
⭐ FerriteCore: Reduces memory usage.
ImmediatelyFast: Improves speed of immediate mode rendering.
Krypton: Optimises the networking stack.
⭐ Lithium: Optimises many different game mechanics.
More Culling: Improves performance of culling.
⭐ ScalableLux: Re-writes the lighting engine to be faster.
⭐ Sodium: Re-writes the rendering engine and gives huge performance gains.
Very Many Players: Improves performance on servers with a lot of players connected.

Resource Packs

Chat Reporting Helper: Simply explains chat reporting.
⭐ Unique Dark Refined: Adds dark mode.
Even Better Enchants: Adds unique item icons for every enchantment book.
Low On Fire: Makes fire smaller on your screen.
Small Shield & Totem: Makes the shield and totem of undying smaller.
Translations for Sodium: Adds more language support for Sodium.

Available Versions

Thallium Beta 26.05.23beta

MC 1.21.11fabric15 downloads

May 23, 2026

Thallium Beta 26.02.07beta

MC 1.21.11fabric24 downloads

February 7, 2026

Thallium Beta 25.11.14-1beta

MC 1.21.10fabric31 downloads

November 14, 2025

Thallium Beta 25.11.13-2beta

MC 1.21.10fabric21 downloads

November 13, 2025

Thallium Beta 25.11.13-1beta

MC 1.21.10fabric23 downloads

November 13, 2025

How to Set Up a Thallium Server

Order Server

Choose at least 4 GB RAM (6 GB recommended for Thallium). Based on player count: per 8 players.

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "Thallium" and click "Install". The fabric loader and Minecraft 1.21.11 are configured automatically.

Start Server & Play

Start the server – all mods are loaded automatically. Share the server IP with friends and play together!

Frequently Asked Questions

Thallium server crashes or won't start – what to do?

Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 6 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.

How much RAM does a Thallium server really need?

Minimum 4 GB, recommended 6 GB for stable performance. per 8 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €8/month).

Can I add custom mods to Thallium without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.11). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.

Thallium server lagging – performance tips

1) Increase RAM to 6 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.