Opaque
by KlooDoh
Opaque brings a complete range of glass building parts, in vanilla glass colors and clear, including doors, trapdoors, fences, fence gates and stairs.
What it does
Each glass piece behaves like the block it replaces: doors and trapdoors open and close, gates swing, and stairs shape themselves to the blocks around them. Fences and gates connect to one another, so glass railings and balconies form continuous runs without chunky posts. Colored and clear variants can be mixed in a single build, for example rainbow bridges, gradient towers or neon shopfronts.
Crafting follows the familiar patterns of the vanilla recipes, so the parts are simple to find in the recipe book. Snap-together trapdoors suit skylights and floor hatches, and fence gates line up with matching fences for tidy entrances. Opaque runs on client and server, so the server and every player need it. It is published for Fabric only, with builds for 1.21.11, and the license is All rights reserved, so the code is not open source.
Key features
Full glass parts set
Doors, trapdoors, fences, fence gates and stairs are available in vanilla glass colors and in clear glass.
Connecting fences and gates
Glass fences join smoothly, and matching gates snap into the wall line for railings, catwalks and pens.
Nearly invisible stairs
Clear glass stairs read as thin ramps, which suits transparent amphitheatres and crystal towers.
Mixed-color builds
Colored glass pieces combine with clear ones for gradients, rainbow bridges and frame windows.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Modern apartments
Clear glass doors, trapdoors and skylights let light spill through interior spaces.
Balconies and animal pens
Glass fences give safety and a view without the bulk of solid railings.
Snow and crystal bases
White and clear glass staircases and towers suit winter and fantasy builds.
Who it’s for: Builders who want light, airy structures from familiar blocks, on servers and clients that already run the mod.
How it compares
Enhanced Glass is a Fabric mod for 1.21.7 under All rights reserved, not open source, and runs on client and server. Rainbow Wood is an open source Fabric mod under the MIT License for 1.21.1, also on client and server, and adds colored wood rather than glass. Doors on Stairs is open source under the MIT License, targets 26.1 – 26.2 and is server-side only, so players join without installing it.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Opaque | Fabric | 1.21.11 | Client and server | 2025-12-13 |
| Enhanced Glass | Fabric | 1.21.7 | Client and server | 2025-07-04 |
| Rainbow Wood | Fabric | 1.21.1 | Client and server | 2025-04-27 |
| Doors on Stairs | Fabric | 26.1 – 26.2 | Server-side only | 2026-07-12 |
Questions
Does Opaque need a loader other than Fabric?
Does Opaque have to be installed on the server?
Can Opaque glass parts be mixed with vanilla glass?
In the catalog
Opaque is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from KlooDoh
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What the author says
Build with glass like it’s a box of coloured candy. Opaque adds a full set of glass building parts in every vanilla glass color (plus clear) doors, trapdoors, fences, fence gates, and stairs. They look airy and bright but still behave like the blocks you already know open, close, swing, and connect cleanly so your…
Official listing
- Modrinth page
- modrinth.com/mod/opaque
- Owner
- KlooDoh
- Published
- 2025-12-12
- Updated on Modrinth
- 2025-12-13
- Facts verified
- 2026-10-15