UglyGlass
UglyGlass restores the classic Minecraft glass texture and adds several alternative bird-safe glass designs for Forge on 1.20.1.
What it does
The mod brings back the original glass block texture from earlier Minecraft releases, so the classic look can be placed again in builds. Alongside it come several other glass designs meant to be less dangerous to birds, which fly into flat, reflective windows. Each design uses small pixel patterns intended to make the surface visible to birds while keeping a clear view for players.
Ideas for the designs are drawn from real-world bird-safe glazing solutions, and in-game text on the blocks explains the reasoning behind each pattern. That makes the mod useful as a teaching aid in builds and servers that want to discuss wildlife protection. UglyGlass is a decoration mod, and it is also listed under mobs, but its content concerns blocks and their textures rather than creatures.
The mod runs on Forge for 1.20.1 only, and its files are not offered for other loaders or game versions. It is client and server, so the server and every player need it. UglyGlass is released under All rights reserved and is not open source. Public links exist for the source code and a wiki.
Key features
Classic glass texture
Restores the plain glass texture of earlier Minecraft versions as a placeable block.
Bird-safe glass designs
Adds several alternative glass blocks with pixel patterns intended to make the surface visible to birds.
Educational in-game text
Blocks carry text that explains the real-world bird-protection ideas behind each design.
Inspired by real solutions
The patterns draw on existing bird-safe glazing approaches rather than invented styles.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Builders working on Forge 1.20.1 who want classic or bird-friendly glass blocks, and server owners who want a teaching element about wildlife in their builds.
How it compares
Obsidian Glass and Fowl Play Unofficial both target Forge 1.20.1 and are client and server, but both are released under All rights reserved and are not open source. Just Enough Glass is also Forge 1.20.1 and client and server, and it is open source under the MIT License. Glassified covers Fabric, Forge and Quilt for 1.20 – 1.20.4 under the MIT License, and Kiwi Boi targets 1.19.2 – 1.20.2 with the GNU Lesser General Public License v3.0 only.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| UglyGlass | Forge | 1.20.1 | Client and server | 2026-04-06 |
| Obsidian Glass | Forge | 1.20.1 | Client and server | 2023-11-25 |
| Fowl Play Unofficial | Forge | 1.20.1 | Client and server | 2025-08-23 |
| Just Enough Glass (JEG) | Forge | 1.20.1 | Client and server | 2026-06-14 |
| Glassified | Fabric, Forge and Quilt | 1.20 – 1.20.4 | Client and server | 2024-06-12 |
| Kiwi Boi | Forge | 1.19.2 – 1.20.2 | Client and server | 2024-11-10 |
Questions
Does UglyGlass need to be installed on the server?
Which loaders and versions does UglyGlass support?
In the catalog
UglyGlass 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.
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Official listing
- Modrinth page
- modrinth.com/mod/uglyglass
- Owner
- CN_GOOD_GRASS
- Published
- 2026-03-29
- Updated on Modrinth
- 2026-04-06
- Facts verified
- 2026-10-15