BossReng's UI Mod
BossReng's UI Mod replaces the plain Minecraft main menu and its sub-menus with seasonal scenery, lofi music, animated screens and liquid glass controls.
What it does
The mod changes the look and sound of the interface around the game. Menus can show seasonal themes, background images and video backgrounds, and they can play lofi music playlists from curated creators. An animated startup sequence plays when the game opens, and the menu stays hidden until that sequence has finished. The active theme also applies to the settings pages, loading screens and transition screens.
Buttons, panels, sliders and text fields use a liquid glass style, and the strength of that effect can be adjusted in the mod's configuration screen. Moving the mouse over the background produces a small parallax motion, and custom sounds play on menu interactions. The interface text is localized. Theme packs are expected in the .brgsui format, and each one is verified before the game uses it: a pack with invalid hashes or altered files is refused rather than loaded, and any pack dropped in while the game runs is only picked up at the following launch.
The mod requires Kotlin for Forge and WATERMeDIA: Multimedia API, and it works alongside Create, Modern UI, Moonlight Lib and Quark when those are installed. It is published for NeoForge on 1.21.1, with 1.1.0-beta as the latest file, and it is client-side only, so servers do not need it. The mod is released under All rights reserved and is not open source.
Key features
Seasonal menu themes
Main menu backgrounds change with the season, using scenery and images supplied by the theme.
Lofi music playlists
Menus can play lofi playlists from several music creators while the player stays on the title screen.
Animated startup sequence
A short animated greeting plays when the game opens, and the menu appears only after it completes.
Liquid glass interface
Buttons, panels, sliders and text fields are drawn in a translucent glass style with an adjustable effect.
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 4
How it compares
Dash's Custom Background Music Mod is client-side only, released under All rights reserved and not open source, with files for 1.21.1. Custom Background Music is client-side only and open source under the MIT License, with files for Forge and NeoForge covering 1.20.1 – 1.21.4. New music is a client and server mod under the Creative Commons Attribution Non Commercial Share Alike 4.0 license, not open source, and published for 1.21.1.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| BossReng's UI Mod | NeoForge | 1.21.1 | Client-side only | 2026-08-25 |
| Dash's Custom Background Music Mod | NeoForge | 1.21.1 | Client-side only | 2026-05-30 |
| Custom Background Music | Forge and NeoForge | 1.20.1 – 1.21.4 | Client-side only | 2025-02-18 |
| New music | NeoForge | 1.21.1 | Client and server | 2026-08-29 |
Questions
Does BossReng's UI Mod need Kotlin for Forge?
Does the server need BossReng's UI Mod?
How are custom theme packs added?
In the catalog
BossReng's UI Mod is one of 3,514 Library mods on ModsFinder, and one of 1,449 Library mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
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What the author says
I created this mod because I felt that Minecraft's main menu and sub-menus were a bit too plain; I wanted to elevate them from ordinary to something with an Apple-esque feel. And I've been listening to some lofi music lately to improve my concentration, so BossReng's UI Mod was born. BossReng's UI Mod brings seasonal…
Official listing
- Modrinth page
- modrinth.com/mod/bossreng-ui-mod
- Owner
- BossReng-GameStudio
- Published
- 2026-04-28
- Updated on Modrinth
- 2026-08-25
- Facts verified
- 2026-10-15