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New mobs on your server. No restart.

Build, paint and animate in the browser. Press Apply and it’s live in the game.

Download for Paper and FoliaSee how it works
  • Free for one server
  • Java Edition 26.2
  • Vanilla clients, no mods

Mobs, items and NPCs

Each one is a single file: the model, its paint, its animations and its config. Pick a slot.

Choose one to look at. Number keys 1 to 9 work too.

Hollow Stag

Passive mob

Grazes at the edge of the forest and bolts when it’s hurt.

Health
24
Speed
0.28
Goals
Wander, flee, look at players
Animations
4

Ember Wyrm

Hostile mob

Coils in lava lakes and lunges at anyone who gets close.

Health
40
Speed
0.32
Goals
Target the nearest player, leap at it
Animations
5

Stone Sentinel

Boss

Wakes when someone sets foot on its plaza. Its health bar runs across the top of the screen.

Health
300
Speed
0.22
Goals
Guard the plaza, melee attack
Animations
6

Lantern Wisp

Passive mob

Drifts over the marsh after dark and lights the path.

Health
6
Speed
0.18
Goals
Wander
Animations
2

Mira the Cartographer

NPC

Keeps the map stall at the market and walks a loop between customers.

Shop
Maps and charts
Route
Market loop, 6 points
Animations
2

Runic Blade

Weapon

Cut from a stone that remembers.
Hums when a rune is near.

Stack size
1
Cubes
11
Animations
Idle, swing

Thornbow

Weapon

Strung with bramble. Slow to draw and hard to dodge.

Stack size
1
Durability
384
Animations
Idle, draw, release

Wayfinder Compass

Tool

The needle turns toward home.

Stack size
1
Animations
Idle, spin

Honeyed Loaf

Food

Still warm, and sticky on top.

Stack size
16
Cubes
6
Animations
Idle, eat

From the Studio to the server

Install the plugin once. After that, every change goes out from the browser.

  1. Step 1

    Install and link

    Put the jar in your plugins folder and start the server. Then run /vstudio connect on the server. It shows a code to enter on the Link a server page.

    Server console

    [12:04:11 INFO]: Done (3.2s)! For help, type "help"
> vstudio connect
Your code is K7QF-2M9X
Enter it at vellumdev.com/link, signed in to your Vellum account.
Linked to Survival as Survival-1.
    The code works once. Enter it at vellumdev.com/link, signed in to your Vellum account.
  2. Step 2

    Build in the browser

    Shape it from cubes and bones, paint right on the model, and animate it. Check it beside a player at true scale before anyone else sees it.

    Hollow Stag
    The Hollow Stag in the Studio’s editor, with its head selected

    hollow_stag.vellum16 cubes · 10 bones · texture 64 × 64

  3. Step 3

    Apply

    The plugin checks every file, builds the pack and serves it. Players pick it up where they stand. Changed your mind? Roll back to the last build.

    Apply checks, builds, swaps and serves, in that order. If any step fails it stops there, and the server carries on exactly as it was.

    Not applied

    Runic Blade needs one fix.

    The guard is turned 30°. Items can only turn in steps of 22.5°, so try 22.5° or 45°. Nothing on the server has changed.

    Live

    Build 9f2c04e1

    38 of 42 players have it. The other 4 are loading it now.

    What the Studio shows after you press Apply.

Made for live servers

Your players stay online while you work, so every change is checked before it reaches them.

  • Apply that can say no

    Every file is checked before anything changes. If one fails, you’re told which file, which part and why, and the server keeps running what it had.

  • Know who has the update

    Each build shows how many players loaded it and who is still on an older one.

  • One file for the model and its config

    Health, behaviour, hit regions and display slots live beside the cubes. The plugin’s YAML is written for you.

  • Checks that know the game

    Angles the game can’t draw, items too large for their slot, a mob with no walk animation. The Studio flags them while you work.

Will it run on my server?

The short answer, before you install anything.

Server
Paper and Folia
Game version
Java Edition 26.2
Players
Vanilla clients, no mods. Bedrock isn’t supported yet.
Content
Custom mobs, items and NPCs
Other plugins
Runs alongside ModelEngine and ItemsAdder. They never interact or share data.
Your work
Open file format. Export everything, any time.

Free for one server

Pay when your team or your network grows. Prices are in US dollars, per team.

Free

One server, one owner.

$0USD

  • Studio access
  • Instant live push
  • 1 server
  • Up to 2 custom mobs or NPCs
  • Unlimited custom items
  • 2 GB pack storage
  • 1 backup
Download

For most teams

Builder

A server and the people who build for it.

$16.99USD per month

or $180 USD a year, saving $23.88

  • Everything in Free
  • Hosted pack and rollback
  • Approvals before Apply
  • 3 Studio seats
    ?

    3 Studio seats for your team, plus the owner’s own seat. 4 seats in total.

  • 1 server
  • Unlimited custom mobs or NPCs
  • Unlimited custom items
  • 10 GB pack storage
  • 10 backups
  • Up to 6 more seats, $4.99 a month each
  • Replies within 24 hours, a working fix within 48
Subscribe

Engineer

Many servers, one careful process.

$29.99USD per month

or $320 USD a year, saving $39.88

7-day free trial for new users. Claim offer

  • Everything in Builder
  • Watch animations live in game
  • 7 Studio seats
    ?

    7 Studio seats for your team, plus the owner’s own seat. 8 seats in total.

  • 4 servers
  • Unlimited custom mobs or NPCs
  • Unlimited custom items
  • 20 GB pack storage
  • Unlimited backups
  • Up to 2 more seats, $4.99 a month each
  • Replies within 8 hours, a working fix within 24
  • Independent player pack
    ?

    Send a development resource pack to one staff member, so they can test changes on the live server before anyone else gets them.

Subscribe

Network adds 3 servers to Builder for $9.99 USD a month. Extra seats are $4.99 USD a month each. Both are billed monthly, whether the plan is paid monthly or yearly.

Subscriptions renew automatically until cancelled, and you can cancel any time from your account. See Refunds & Cancellation and the Terms.

Questions

Do I need to restart to update content?

No. Apply swaps the content while the server runs, and players get the new pack without leaving.

Does it replace ModelEngine or MythicMobs?

It runs alongside them. Vellum shows and configures its own models and doesn’t read their files today.

Can I bring my Blockbench models?

No. Vellum opens its own files and doesn’t import Blockbench models. You build in the Studio.

Who owns what I make?

You do, on every plan. Export every model and pack whenever you like.

What if Vellum’s service goes down?

Your server keeps running, and the content it has already loaded keeps working. You can edit the plugin’s files by hand in the meantime, and the Studio picks your changes up when it is back.

Your next mob could be live tonight

Download coming soon

The jar, its size and its SHA-256 checksum will be listed here when it is published.