Iris Caves
by ZeldoxXx
Iris Caves makes the cave biomes of Alex's Caves keep their colored fog, glow and red boss sky when a shader pack is active in Oculus on Forge 1.20.1.
What it does
Under shaders, the six Alex's Caves cave biomes regain their fog colors: toxic green, primordial gold and abyssal blue. While the primordial boss fight runs, the fog overhead turns the same ominous red, overriding the vanilla fog. Normal cave color is restored outside the boss fight, and the tint and strength can be adjusted with sliders. The Deepsight effect brightens dark areas again.
On launch the mod finds a supported shader pack in the shaderpacks folder and writes a patched copy named iriscaves. The original pack is never touched, and the patched copy is picked from the shader menu. Support covers the Complementary family, including Complementary Reimagined and Unbound, plus BSL, Bliss and Solas for the portable biome fog tint. Other packs are left untouched, so they are not broken. Required dependencies are Alex's Caves and Oculus; Euphoria Patches is optional and is recommended with the Complementary family.
The mod also fixes the issue where half of the projectiles turn invisible when shaders are on. Everything ships with in-game sliders under Shader options, Lighting Settings, in the Complementary pack. The mod is Client-side only and is not open source.
Key features
Cave biome fog colors
Six Alex's Caves cave biomes get their colored fog back while a shader pack is running.
Red boss atmosphere
During the primordial boss fight the sky fog turns red, replacing the vanilla fog.
Adjustable tint and strength
Fog color tint and strength are set with in-game sliders under Shader options.
Patched shader pack copy
A patched copy of a supported pack is written beside the original, which stays unchanged.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Optional 1
Use cases
Who it’s for: Players who use Alex's Caves with Oculus shader packs on Forge 1.20.1, and server owners who want the same lighting on their clients.
How it compares
Dimensions of Alex's Caves JEI integration is a Forge mod for 1.20.1 – 1.20.6 that runs on the client and server together, released under the MIT License and open source. Fog Looks Modern Now covers Forge and NeoForge for 1.20 – 1.20.4, is Client-side only, uses the CC0 1.0 Universal license and is open source. Oculus Unlocked is Client-side only for 1.20.1 and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Iris Caves | Forge | 1.20.1 | Client-side only | 2026-07-12 |
| Dimensions of Alex's Caves JEI integration | Forge | 1.20.1 – 1.20.6 | Client and server | 2026-07-31 |
| Fog Looks Modern Now | Forge and NeoForge | 1.20 – 1.20.4 | Client-side only | 2023-12-13 |
| Oculus Unlocked | Forge | 1.20.1 | Client-side only | 2026-03-30 |
Questions
Does Iris Caves need Alex's Caves and Oculus?
Does the server need Iris Caves?
Will the original shader pack change?
Which shader packs does Iris Caves support?
In the catalog
Iris Caves is one of 12,078 Decoration mods on ModsFinder, and one of 6,149 Decoration mods for Forge. 34,764 mods support Minecraft 1.20.1.
Similar mods
What the author says
Alex's Caves looks incredible without shaders and kind of falls apart with them. Its cave biomes lose their colored fog and glow, the primordial boss stops painting the sky red, and half its projectiles turn invisible. IrisCaves fixes that — it teaches your shader pack about Alex's Caves so the two finally play nice…
Official listing
- Modrinth page
- modrinth.com/mod/iris-caves
- Owner
- ZeldoxXx
- Published
- 2026-07-12
- Updated on Modrinth
- 2026-07-12
- Facts verified
- 2026-10-15