Crystal Opacity
by cutebow
Crystal Opacity lets players adjust how see-through crystal blocks look, using a set of slider and toggle controls for each part.
What it does
Crystal blocks in the game can be made more or less transparent by the player. The mod adds a core opacity slider, separate sliders for the inner glass, outer glass and extra glass layers, and per-part toggles so each layer can be switched on or off independently. Changing these values only alters how crystals are drawn on the player's screen.
Settings are reached through Mod Menu, which is the intended entry point for the configuration screen. Because the mod only changes rendering, it has no effect on blocks, recipes, worlds or other players. Players who want fully solid crystals or a faint, almost invisible look can set the sliders to match.
Crystal Opacity is built for Fabric and targets Minecraft 1.21 – 1.21.11, with files for 12 release versions. The mod is client-side only, so servers run without it. It is released under All rights reserved and is not open source.
Key features
Core opacity slider
A single slider sets the overall transparency of crystal blocks, so the whole look can be adjusted at once.
Per-layer glass sliders
Separate sliders control the inner glass, outer glass and extra glass layers, letting each part of a crystal be tuned on its own.
Per-part visibility toggles
Each glass layer can be turned on or off, which changes which parts of a crystal are drawn.
Mod Menu settings screen
Options are gathered in a configuration screen opened from Mod Menu, keeping the controls in one place.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x12 of 12 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
GlassSlab is a Fabric mod for 1.21.1 that runs on the client and the server, and it is open source under the MIT License, so it changes glass on both sides. Paintings Need Glass is a client-side only Fabric mod for 1.21.11, also open source under the MIT License. HitColor X is client-side only on Fabric for 1.21.11 – 26.2 under the MIT License, but it is not open source. Enhanced Glass is a client and server Fabric mod for 1.21.7, released under All rights reserved. Shade & Saturation Slider is a client-side only Fabric mod for 1.21.10 – 26.2, also released under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Crystal Opacity | Fabric | 1.21 – 1.21.11 | Client-side only | 2026-03-07 |
| GlassSlab | Fabric | 1.21.1 | Client and server | 2025-08-04 |
| Paintings Need Glass (PNG) | Fabric | 1.21.11 | Client-side only | 2026-07-09 |
| HitColor X | Fabric | 1.21.11 – 26.2 | Client-side only | 2026-07-04 |
| Enhanced Glass | Fabric | 1.21.7 | Client and server | 2025-07-04 |
| Shade & Saturation Slider | Fabric | 1.21.10 – 26.2 | Client-side only | 2026-07-05 |
Questions
Does Crystal Opacity need to be installed on the server?
Which loader does Crystal Opacity use?
Which game versions does Crystal Opacity support?
Does Crystal Opacity work with Mod Menu?
In the catalog
Crystal Opacity is one of 12,078 Decoration mods on ModsFinder, and one of 6,982 Decoration mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from cutebow
Similar mods
What the author says
Let's you make crystals transparent or see through with a opacity slider and then a per part toggle for opacity so theres - Core opacity slider - Inner glass opacity slider - Outer glass opacity slider - Extra glass opacity slider Requires - Silicon: Silicon - Mod Menu: Mod Menu - YACL: YACL
Official listing
- Modrinth page
- modrinth.com/mod/crystal-opacity
- Owner
- cutebow
- Published
- 2026-03-06
- Updated on Modrinth
- 2026-03-07
- Facts verified
- 2026-10-15