AI · Robotics · Animation

GR00T MotionBricks

Real-time NVIDIA Humanoid Animation for Unreal Engine 5.5+

Stream live NVIDIA MotionBricks G1 robot animation directly into Unreal Engine 5.5+ via a lightweight Python sidecar. 29-DOF skeletal puppet, WASD locomotion control, 13 motion styles (walk, stealth, zombie, dance…), full Blueprint API — the first turnkey NVIDIA humanoid animation plugin for UE5.

View Docs → Buy on Fab Get Sidecar ↓
GR00T MotionBricks — NVIDIA G1 humanoid animation in Unreal Engine 5

Key Features

Live AI Animation

NVIDIA MotionBricks inference streams 29-DOF G1 poses at 30–60 Hz via UDP — no baked clips, fully generative.

13 Motion Styles

Walk, slow walk, stealth, zombie, injured, hand crawl, elbow crawl, happy dance, gun walk, scared — hotkey switchable at runtime.

Blueprint-Ready API

Connect, poll poses, send locomotion commands — fully exposed to Blueprints. No C++ required for day-to-day use.

G1 Skeletal Mesh

29-DOF UE T-pose skeletal mesh with correct per-joint rotation axes. Drop into any level in minutes.

WASD + Hotkeys

Built-in keyboard locomotion. W/A/S/D for movement, arrow keys to turn, F/R/Z/E and more for style switches.

Fab Policy Compliant

UE plugin contains only C++ and UE assets. Python sidecar (NVIDIA dependency) is downloaded separately after purchase.

How It Works

[Unreal Engine 5.5+] ←── UDP JSON 7777 ──→ [Python Sidecar] → MotionBricks (CUDA) | ↑ G1 Puppet HTTP POST /control (WASD + style)
01
Install UE Plugin
Buy on Fab → install via Epic Games Launcher → enable in your project.
02
Download Sidecar
Verify your Fab order below → download the Python sidecar package for your OS.
03
Run Sidecar
Set MOTIONBRICKS_ROOT, run start_sidecar.bat — models load in seconds.
04
Play In UE
Open the demo map, click Play — G1 walks live with WASD. Switch styles with hotkeys.
Engine:Unreal Engine 5.5–5.8
Platforms:Win64, Linux, Mac
GPU (sidecar):NVIDIA RTX — CUDA 12+
Python:3.10 + conda (sidecar only)
API:Blueprint & C++
DOF:29-DOF G1 skeleton

⬇ Download Python Sidecar

The Python sidecar (NVIDIA MotionBricks bridge) cannot be distributed through Fab due to marketplace policy. After purchasing the UE plugin on Fab, verify your order ID below to unlock the sidecar download.

Why separate? Fab.com only allows UE C++ code and UE assets in plugin packages — no Python scripts, executables, or third-party AI runtimes. The sidecar runs locally on your machine alongside Unreal Engine and communicates over localhost UDP.

Already purchased on Fab?

  • Step 1 — Purchase GR00T MotionBricks on Fab.com
  • Step 2 — Find your Fab Order ID in your Fab account → Orders
  • Step 3 — Paste it below and click Verify
  • Step 4 — Download the sidecar package for your OS

Purchased directly on ASRock Studios? Your sidecar download is available in My Library →
Purchase

Get the Plugin

Buy direct here (includes sidecar in My Library) or purchase on Fab.com (UE plugin only — verify order above for sidecar access).

  • GR00T MotionBricks UE Plugin (C++ source + content)
  • Python sidecar download (NVIDIA MotionBricks bridge)
  • Lifetime license — one studio
  • All future updates included
  • Setup support via Discord

Sign in with Discord before checkout. Sidecar appears in My Library immediately after payment.

Questions about NVIDIA weights or CUDA setup?

We can help with sidecar environment, MOTIONBRICKS_ROOT, and live inference setup.

Get Support → Read the Docs