Opal

Opal is a lightweight Fabric client modpack designed to improve Minecraft performance, stability, and responsiveness while preserving the vanilla experience.

Designed for low-end systems, laptops, Chromebooks, and battery-limited devices, Opal prioritises optimisation without adding gameplay changes or unnecessary features.

If you’re looking for additional client features such as HUD enhancements or shader support, consider trying Onyx instead.

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• Significant performance improvements over vanilla
• Reduced memory usage and smoother gameplay
• No gameplay changes or added content
• Fabric-based and multiplayer-safe
• Tested on low-end hardware and mobile devices

If you want additional visual and quality-of-life features, consider using Onyx, which builds on the same optimisation philosophy with expanded functionality.

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Testing

Tested on a laptop running Windows 11. Specs include:

• Intel Core i5-1135G7 CPU
• Intel Iris Xe Graphics
• 8GB RAM (2GB Allocated)

Achieved average frame rate between 500 - 600 in different scenarios including world generation

Tested on a chromebook running ChromeOS. Specs include:

• Intel Pentium Silver N5030 CPU
• Intel UHD Graphics
• 2770MB RAM (1024 Allocated, only around 800MB available)

Achieved average frame rate between 50 - 60 in normal gameplay with around 30 - 35 fps when generating the world and loading chunks

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• Client-side only
• Works on vanilla and modded servers (where client mods are allowed)
• Resource packs and settings included are optional and can be changed freely
• Support for older versions will take longer to release as newer versions take priority

Opal is intended to be a simple, dependable optimisation base that you can use as-is or build on with additional mods. Backup your worlds and configs when updating. This modpack is geared towards very low-end devices and therefore I will be very selective about the mods added to keep the total amount small and easy to run.