GLSL Fog
by qMace_
GLSL Fog replaces the default fog with a perlin-noise cloud style fog, and it also changes the color of the sky.
What it does
Once installed, the fog gets a shader-based look that the author describes as a perlin-noise cloud effect. Fog is drawn with noise-driven shapes instead of the flat vanilla haze, and the sky takes on a different color because the fog affects it as well. Fog color is set as a hex value in the mod's config file, and an options screen button in the bottom corner opens the settings for fog height and color.
GLSL Fog is client-side only, so the server and other players do not need it, and it runs on Fabric for 1.21.1 only. The mod is published under All rights reserved and is not open source. A single build, 1.21.1_fabric for 1.21.1, was released on 2026-05-13, and the project has not been updated since.
Key features
Perlin-noise cloud fog
Fog is rendered with a noise pattern meant to resemble clouds, instead of plain distance haze.
Sky color from fog
The fog also changes the sky color, so the tint of the fog and the sky shift together.
Hex color setting
Fog color is entered as a hex code in the config file, so any single color can be chosen.
Adjustable fog height
A height setting in the config screen moves the fog up or down, with values up to the largest number the author allows.
Custom RGB mode
A custom RGB mode cycles the fog through shifting colors, which the author calls a rainbow fog.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Moody single-player scenes
Fog that reads as clouds or an unusual sky suits horror maps, dim caves and other atmospheric builds.
Decorative sky builds
Players designing a themed sky can set the fog hex color to match the look they want.
Who it’s for: Players who want a strongly stylized fog and sky on the client side, and map makers building a specific atmosphere. Because the fog is set in the config file, it suits players comfortable editing a text file.
Questions
Does GLSL Fog need to be installed on the server?
Which loader and version does GLSL Fog support?
Where is the fog color changed?
In the catalog
GLSL Fog is one of 7,555 Cursed mods on ModsFinder, and one of 4,235 Cursed mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from qMace_
Similar mods
What the author says
This mod in basic makes the fog look INSANE. Look at the images to find out what it looks like as well.
Official listing
- Modrinth page
- modrinth.com/mod/glsl-fog
- Owner
- qMace_
- Published
- 2026-05-13
- Updated on Modrinth
- 2026-05-13
- Facts verified
- 2026-10-15