About the Seamless mod
A client-side data-driven mod that connects the outlines of double blocks, like doors and beds. The mod is entirely configurable through resource packs, which allows any combined block, no matter its size, to have one big outline.

Connected outlines for:
- Doors
- Beds
- Double Chests
- Large Plants, like Tall Grass, Peonies and Pitcher Plants
- Small Dripleaves
- Pistons
- Tall Seagrass
- Pitcher Plant Crops
Most modded Plants, Doors, Chests and Beds should work too!

It's completely data-driven!
This means that you can add compatibility for any mod yourself, through simple resource packs. Want to learn how? Take a look at the Docs.
Built-in compatibility with:
- Create (Glass, Train, Brass, Copper and Andesite Doors)
- Supplementaries (Flax, Spring Launchers)
- Fast Paintings (Paintings)
- Farmer's Delight (Rice, Full Tatami Mats)
- Haunted harvest (Corn)
- Sleep Tight (Hammocks, Night Bags)
- Waystones (Waystones)
- Upgrade Aquatic (Bedrolls, Flowering Rush, Pickerelweed, Beach Grass)
- Biomes o' Plenty (Brimstone Clusters, Eyebulbs)
- Environmental (Cattails, Large and Giant Lily Pads, Tall Dead Bushes)
- Atmospheric (Water Hyacinths, Yucca Flowers)
Got a suggestion? Please let me know!
Mods that added their own compat:
- Comforts (Sleeping Bags, Hammocks)
- Dramatic Doors (Tall Doors)
How to install Seamless
With Millida Launcher
Install Millida Launcher
The launcher is free: download it at millida.net/launcher and sign in with any nickname.
Click “Install” on this page
The launcher opens and installs the mod for Minecraft 1.21–1.21.5 on Fabric or NeoForge automatically, together with its dependencies: Architectury API.
Launch the game
A profile with it appears in the launcher: click “Play”.
Manually
Install Fabric or NeoForge
The loader must match the game version of the mod file, for example Minecraft 1.21.5. After installing it, a separate profile appears in your launcher.
Download the file for your version
In the version list above, pick the file seamless-2.3.2-fabric-1.21.4.jar (637 KB) for your game version and loader.
Put it in the mods folder
The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it. Required dependencies go there too: Architectury API.
Launch the loader profile
Open “Mods” in the main menu: Seamless should be in the list.
Seamless works on the player’s side only: there is no need to install it on a server.
Minecraft 1.21.5 runs on Java 21: with a different Java version the game may close right after launch.
Versions
With dependencies
| Minecraft | Loader | File | Date | Actions |
|---|---|---|---|---|
| 1.21.4 | Fabric | 1.21.4636 KB 2 | ||
| 1.21.4 | NeoForge | 1.21.4642 KB | ||
| 1.21.1 | Fabric | 1.21.1638 KB | ||
| 1.21.1 | NeoForge | 1.21.1645 KB | ||
| 1.21.5 | Fabric | 1.21.5637 KB | ||
| 1.21.5 | NeoForge | 1.21.5643 KB | ||
| 1.21.1 | Fabric | 1.21.1639 KB | ||
| 1.21.1 | NeoForge | 1.21.1646 KB |
What it needs to run
- Architectury APIrequired
FAQ
Which Minecraft versions does Seamless work on?
There are files for 1.21.5, 1.21.4, 1.21.1, 1.21. The newest is 1.21.5.
Is Seamless for Forge or Fabric?
There are files for Fabric: 1.21–1.21.5 and for NeoForge: 1.21–1.21.5. There are no files for Forge: a mod for another loader will not start.
What does Seamless need to work?
Required: Architectury API. Without it the mod will not start: dependencies go into the same mods folder.
Do I need to install Seamless on a server?
No. Seamless works on the player’s side only: there is no need to install it on a server.
Which Java does Seamless need?
Minecraft 1.21.5 runs on Java 21. If the game closes right after launch, the usual cause is the wrong Java version in the profile settings.
How do I download Seamless?
With Millida Launcher: it installs Seamless into a modpack by itself, for the right game version and loader. The launcher is free.
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