ModsFinder

GLass

by its-Hans

GLass lets a player set the OpenGL version Minecraft requests at launch, through a config file, for systems with outdated graphics hardware.

FabricClient-side onlyGNU General Public License v3.0 onlyOpen source1.21.10

What it does

GLass is a lightweight Fabric mod for Minecraft 1.21.10 that lets the game run with a chosen OpenGL version. The version is set in a config file, and the mod can either enforce a higher context or force a specific one. Its main use is fixing compatibility problems on older graphics hardware. The mod is published only for 1.21.10 and is open source under the GNU General Public License v3.0 only, and only the client needs it.

Key features

  1. Higher context requests

    The mod can request a higher OpenGL context than the game would otherwise use.

  2. Forced OpenGL version

    A specific OpenGL version can be forced at launch, which can work around problems on older graphics cards.

  3. Adjustable settings

    The chosen OpenGL version is read from a config file, so it can be changed without editing game files.

Compatibility

Latest build for each game version and loader.

1.21.100.0.1
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

How it compares

Full comparison

ESCraft is a Fabric client mod for 1.21.11 under the MIT License, so it targets a different game version than GLass. ForceGL is a Fabric client mod for 26.1.2, released under the GNU Lesser General Public License v3.0 only, and it targets a different version from GLass as well.

ModLoadersGame versionsEnvironmentUpdated
GLassFabric1.21.10Client-side only2026-01-24
ESCraftFabric1.21.11Client-side only2026-01-13
ForceGLFabric26.1.2Client-side only2026-06-08

Questions

Does GLass need Fabric API?

No required dependency is listed for Fabric.

Does GLass have to be installed on the server?

No. It is installed on the player's side alone, so servers need nothing.

In the catalog

GLass is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 15,569 mods support Minecraft 1.21.10.

Optimization mods3,545Fabric modsMods for 1.21.1015,569

Similar mods

Sodium1.16.3 – 26.3Iris Shaders1.16.5 – 26.3Entity Cullingb1.7.3 – 26.3FerriteCore1.16.5 – 26.3ImmediatelyFast1.18.2 – 26.3Sodium Extra1.16.2 – 26.3

What the author says

# GLass👓 > Change your GL version in a breath. GLass is a lightweight Minecraft mod that allows you to customize the OpenGL version through a config file. It lets you force Minecraft to run with a specific OpenGL version, either to enforce a higher context or to fix compatibility issues on outdated hardware.
its-Hans, on the Modrinth page

Official listing

Owner
its-Hans
Published
2026-01-24
Updated on Modrinth
2026-01-24
Facts verified
2026-10-15

Tags

OptimizationUtility
Open on ModrinthCompare