Lightium

ℹ️ About Modpack

This is a modpack that focuses on optimization while preserving the integrity of the vanilla game. It includes essential performance and utility mods to improve FPS, reduce memory usage, fix minor bugs, and extend chat features in both singleplayer and multiplayer. Designed as a lightweight template with minimal configuration, it can be customized or expanded with additional mods according to user preference.

1. Does not affect vanilla gameplay.

This modpack focuses purely on performance and optimization. It does not change vanilla gameplay or any game mechanics.

2. It speeds up the game tremendously (both in multiplayer and singleplayer).

This modpack focuses on performance and optimization. It includes mods like Sodium, Lithium, and FerriteCore to improve FPS, reduce memory usage, and streamline gameplay in both singleplayer and multiplayer.

3. Adds a few really useful essential mods.

This modpack also includes essential utility mods. They fix minor bugs, extend chat history, and allow joining servers on different versions (more below).

4. It’s lightweight, with no more than 25 mods.

It contains only essential performance and utility mods. The pack remains simple and easy to manage, with no more than 25 mods included.

5. It's the perfect template for your mod pack (but you must comply with the MIT license).

This modpack is designed as a simple template with minimal configuration. It provides a base that can be customized or expanded with additional mods according to the user’s preference.

6. Smooth gameplay even on low-end PCs.

Also suitable for slower computers, laptops, and Macs (I use a Mac, so I can confirm), ensuring stable and smooth gameplay without performance issues.

📦 What it has inside:

Included mods	Description	Supported versions
Fabric API	Core library required by most Fabric mods.	1.21.x
Sodium	Improves FPS with a fully reworked rendering engine.	1.21.x
Sodium Extra	Adds extra settings and visual features on top of Sodium.	1.21.x
FerriteCore	Reduces memory usage by optimizing data handling.	1.21.9
Lithium	Optimizes block ticking, mob AI, and game physics.	1.21.x
Mod Menu	Adds a menu to view and configure installed mods.	1.21.x
Entity Culling	Skips rendering entities that are not visible.	1.21.10
More Culling	Adds extra culling methods to further reduce rendering load.	1.21.x
ImmediatelyFast	Speeds up rendering by optimizing draw-call buffers.	1.21.x
BadOptimizations	Includes small micro-optimizations (e.g., skipping lightmap recalculations).	1.21.x
ScalableLux	Optimizes the lighting system (Starlight fork) with faster calculations.	1.21.x
Very Many Players	It is a Fabric optimization mod that improves server performance with many players while staying fully vanilla-compatible.	1.21.x
Krypton	Krypton optimizes Minecraft’s networking with Fabric’s Netty handlers, boosting performance through micro-optimizations and flush consolidation.	1.21.9
Ksyxis	Speeds up chunk loading with optimized generation logic.	1.21.8 (Only up to 1.21.8 because Mojang removed spawn chunks, so this mod is no longer useful.)
Cloth Config API	Configuration Library for Minecraft Mods.	1.21.x

Other mods (also included)	Description	Supported versions
Reese's Sodium Options	Reese’s Sodium Options enhances the Sodium settings menu with a cleaner UI, search, and improved sliders.	1.21.x
No Chat Reports	Disables the chat reporting system to keep messages private.	1.21.x
More Chat History	Extends the chat history so more past messages can be viewed.	1.21.x
ViaFabricPlus	Allows joining servers on different Minecraft versions using ViaVersion.	1.21.x
Debugify	Fixes known vanilla Minecraft bugs through small patches.	1.21.8

They are there because they are really useful mods, but it's up to you whether you delete them later if you want to.

🚀 Quick Start:

• Download the Modrinth App.
• Install the Lightium via "Browse" in the app.
• Play and enjoy performance. More info in the Modrinth Modpack Guide.

🏷️ Versioning System:

‼️ This mod pack will be from 1.21.8 (it will never be less than that). ‼️

Lightium follows this versioning scheme the name will always be "Lightium":

          (e.g. 1.00.0)          (e.g. 1.0.0)
[Name]-[Minecraft version]-[version of the mod pack]

❓ Frequently Asked Questions (FAQ)

💬 Will this change how Minecraft looks or plays?

No, there is no mod in this modpack that would change the appearance of the vanilla game.

🚀 How much faster is it?

The result varies depending on what kind of computer you have, but in my opinion it can be anywhere from 50-500% (it depends).

🧱 Is it compatible with servers and realms?

Yes! This pack is completely client-side only, meaning you can use it on vanilla servers, Realms, and even at modded servers.

🔌 Can I remove or add mods to this pack?

Absolutely. The package is modular. You can remove mods or add them if they are compatible with Fabric and other mods that I have in my modpack.

🎮 Does it support shaders?

Not until you add the Iris mod to my mod pack, then yes.

🧩 Is this the same as Fabulously Optimized / Simply Optimized?

No, but it’s similar in purpose. This pack is focused on minimalism and raw performance—even fewer optional tweaks and visual mods.

📦 Is there a Lite version?

No, but you can remove optional mods and that create your own lite version :).

🛠️ What modloader does this use?

This pack uses only Fabric. Forge, Quilt, and others are NOT supported.

🧩 Can I use this with Prism Launcher/MultiMC/Modrinth App?

Yes, the modpack works with all major launchers that support Fabric modpacks.

💻 Is this good for laptops / low-end PCs?

Yes! This mod pack is also designed for lower-spec hardware.

🧪 Is this safe to use on survival/long-term worlds?

Yes, it only affects performance, not gameplay or world files.

📡 Does it affect online multiplayer or ping?

Yes, this mod pack affects multiplayer, but only in terms of performance, so it doesn't change anything except speed.

📦 Can I bundle this pack with my own?

Yes, as long as you comply with the MIT license... or you can use mine :).

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This modpack is made by driedlime