Supplementaries Mod (1.21.1) – A Plethora of New Blocks, Decorative

Supplementaries is a Vanilla+ decoration and utility mod that adds jars, signposts, faucets, weather vanes, spring launchers, sconces, planters, and dozens of other functional blocks to Minecraft, available for Fabric, Forge, and NeoForge.

Vanilla Minecraft has always had a decoration problem. You can build impressive structures, but the interiors feel empty. There are no jars to store items on shelves, no signposts to mark paths at crossroads, no faucets to make your kitchen look functional. Supplementaries solves this by filling those gaps with blocks and items that are both beautiful and useful. With over 17 million downloads on Modrinth and active development by MehVahdJukaar since 2023, it has become one of the most trusted Vanilla+ mods in the community. The mod is also highly configurable — every single feature can be toggled or tweaked through its config file, so you only keep what fits your playstyle.

Key Features of Supplementaries

• Jars and Jar Variants — Jars let you store and display items, liquids, and even small mobs inside glass containers placed on any surface. This means you can finally create apothecary shelves, potion displays, or decorative cookie jars that actually hold their contents. They work as both functional storage and aesthetic pieces, blending seamlessly with vanilla textures.
• Signposts and Waypoints — Signposts can be attached to fence posts and point players in specific directions with custom text. This is incredibly useful for multiplayer servers where you need to guide players between builds, villages, or points of interest. Unlike regular signs, signposts look natural at crossroads and trail junctions.
• Faucets and Liquid Transfer — Faucets attach to the front of containers and pour out their contents into blocks below, enabling simple liquid and item transfer without complex redstone. They work with jars, cauldrons, and other containers, adding both a decorative kitchen element and a lightweight automation tool for players who want function without the redstone clutter.
• Weather Vanes and Environmental Blocks — Weather vanes spin to indicate wind direction and upcoming weather changes, giving your rooftops a realistic medieval touch. Beyond aesthetics, they provide actual gameplay information, letting you predict rain or storms without checking external tools. Combined with wind vanes and flags, your builds gain dynamic movement.
• Spring Launchers and Redstone Utilities — Spring launchers catapult entities upward when powered by redstone, opening up creative possibilities for elevators, traps, and minigames. These mechanical blocks expand what you can build with vanilla-style redstone without requiring a dedicated tech mod. They are simple to use but surprisingly versatile in practice.
• Sconces, Candelabras, and Lighting Options — Supplementaries adds multiple new light sources including sconces, candelabras, and lantern-style fixtures that mount on walls and ceilings. These fill the gap between torches and the limited vanilla lantern, giving builders proper medieval, rustic, or fantasy lighting options. Each light source has a distinct style that suits different build themes.
• Planters and Flower Boxes — Planters and flower boxes let you place vegetation in controlled, decorative arrangements on windowsills, walls, and tabletops. Vanilla Minecraft forces flowers onto dirt blocks, but planters free you to add greenery anywhere in your builds. This single feature transforms how interiors and exteriors look in towns, gardens, and market areas.

Screenshots

How to Install Supplementaries

1. Install your preferred mod loader: Fabric, Forge, or NeoForge for your Minecraft version (1.21.1, 1.21, or 1.20.1).
2. Download and install Moonlight Library, which is a required dependency for Supplementaries to function.
3. Download the correct Supplementaries file for your loader and Minecraft version from the official download links below.
4. Place both the Supplementaries .jar file and the Moonlight Library .jar file into your .minecraft/mods folder.
5. Launch Minecraft with your mod loader profile. Supplementaries will generate a config file on first launch that you can edit to enable, disable, or tweak every feature.

Requirements & Compatibility

What's New

• Fixed a crash related to quivers caused by a recent pull request change — the slot reference registry is now properly synced again as originally intended.
• Resolved an issue with certain actions triggering immediately instead of respecting their intended delay timing.
• Ongoing stability improvements and bug fixes to maintain compatibility with the latest Minecraft versions.

Pros and Cons

Alternatives to Supplementaries

• Decorative Blocks — A focused decoration mod that adds purely aesthetic blocks like beams, supports, and lattices without the utility features, ideal if you only want building materials.
• Macaw's Furniture — Adds complete furniture sets including chairs, tables, desks, and kitchen appliances for players who want fully furnished interiors rather than individual decorative items.
• Handcrafted — A modern furniture and decoration mod with a clean aesthetic, offering couches, shelves, and counters that complement Supplementaries well if you want even more variety.

Download Supplementaries

Always download mods from official sources to stay safe.

Frequently Asked Questions

Is Supplementaries compatible with Fabric?

Yes — Supplementaries officially supports Fabric for Minecraft 1.21.1, 1.21, and 1.20.1. However, the mod is primarily developed for Forge and NeoForge, so the Fabric version may occasionally be missing minor features or receive updates slightly later. For the most complete experience, the Forge or NeoForge version is recommended.

Does Supplementaries require any other mods to work?

Yes — Moonlight Library is a mandatory dependency. You must install Moonlight Library alongside Supplementaries or the mod will not load. Both files go into your mods folder and must match the same Minecraft version and mod loader.

Can I disable specific features I don't want?

Yes — Supplementaries is highly configurable and lets you toggle every feature individually. After your first launch, the mod generates a configuration file where you can disable any block or item. You can also join the mod's Discord server for help with advanced customization options.

Will Supplementaries slow down my game or cause lag?

Supplementaries appears to be lightweight for most systems, given its focus on simple decorative and utility blocks rather than complex world generation or entity systems. With over 17 million downloads and widespread modpack inclusion, significant performance issues would be widely reported. That said, performance can vary depending on your hardware and how many other mods you run alongside it.

Can I use Supplementaries in my modpack?

Yes — the mod author explicitly permits inclusion in modpacks without needing to ask for permission. This is stated in the official mod description. Just make sure to include the required Moonlight Library dependency in your modpack as well so that players do not encounter missing dependency errors.

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