faq
Straight Answers, Without the Marketing Fog.
Clear, technical answers about AI generation, hardware limits, mocap import, IK retargeting, model licensing, and Unreal Engine 5.8 integration.
1. AI Generation & Timeline Directing
How text prompts turn into continuous 3D performances.
What exactly is MotionSmith AI?
MotionSmith AI is a local character animation studio plugin built natively for Unreal Engine 5.8. It unifies natural language motion synthesis, multi-beat timeline authoring, FBX/mocap import, joint tweaking, and Unreal IK retargeting inside one focused editor tab.
Does MotionSmith generate animations purely from text prompts?
Yes. Describe physical actions in plain English (e.g., sprint forward 3 meters, slide into cover). The embedded diffusion backend generates realistic 3D skeletal motion directly matching your kinematic direction.
Can I build a long cinematic performance from multiple short prompts?
Yes. The Multi-Prompt Timeline is specifically architected for this. Rather than gambling a 15-second sequence on one giant paragraph, you direct beat by beat (e.g., Beat 1: Idle ➔ Beat 2: Walk ➔ Beat 3: Jump) and sequence them continuously.
Does adding a new segment regenerate or overwrite my earlier approved work?
No. MotionSmith uses incremental inertial tail chaining. Once you approve a clip, its keyframes are locked. New segments sample the terminal momentum, velocity, and foot contact of the previous clip without recalculating earlier work.
What are "Domain Recipes" and when should I use them?
Recipes adjust internal kinematic priors and contact stiffness. Use Locomotion for clean walking/turns without foot sliding, Combat & Acrobatics for high-flying kicks and rolls, Idle & Gestures for expressive upper-body acting, and Props Interaction for object-aware poses.
2. Mocap Import, Retargeting & Engine Output
How generated motion integrates with your game characters and assets.
Can I import existing FBX / Mocap animations into the timeline?
Yes. You can import any existing Unreal AnimSequence or FBX mocap asset. It places directly onto the timeline and can be adjusted with Transform tools or extended with new AI-generated motion.
Which character skeletons can I retarget to?
MotionSmith includes native Unreal Engine IK Retargeter presets for:
- UE5 Mannequins (Manny and Quinn)
- MetaHumans (Male and Female body types)
- Character Creator 4 (CC4 / AccuRIG)
- Mixamo Biped Skeletons
- Custom Proprietary Skeletons via your own IK Retargeter assets
Does MotionSmith support Root Motion extraction?
Yes. When baking to an AnimationSequence, you can choose between:
- Root Motion (World Space): Injects character ground displacement into the Root bone for gameplay montages and locomotion.
- In-Place (Zeroed Root): Keeps the character anchored at origin for blendspace or procedural locomotion systems.
What assets does MotionSmith produce?
It outputs standard, native Unreal Engine UAnimSequence assets directly into your Content Browser. They are immediately compatible with Sequencer, State Machines, Animation Montages, and Control Rig.
Can I edit key poses and mirror animations inside the plugin?
Yes. The Studio includes built-in authoring tools: Joint Rotation Tweakers, Pose Pinning, 1-Click Sagittal Plane Mirroring, and a 3D Root Path Spline Editor to redirect character walking trajectories.
Does MotionSmith replace traditional keyframe animation?
No. It serves as a rapid motion accelerator. It eliminates tedious blocking from scratch while leaving full creative control to animators for final polish in Unreal Engine.
3. GPU Requirements, Models & Local Inference
Technical requirements, local storage, and execution architecture.
Does motion generation run 100% locally on my machine?
Yes. All AI inference (text encoding and diffusion generation) executes locally on your GPU. No data, prompts, or assets are ever uploaded to cloud servers.
Do I need to install Python, PyTorch, or set up a Conda environment?
No. The separate MotionSmith Runtime includes the required Python and PyTorch/CUDA environment, so no manual Python or Conda setup is required.
What are the hardware and GPU requirements?
You need an NVIDIA RTX GPU with CUDA support:
- Minimum: 8 GB Dedicated VRAM (e.g., RTX 3060, RTX 2070, RTX 4060)
- Recommended: 16 GB Dedicated VRAM (e.g., RTX 3080, RTX 4070 Ti, RTX 4090)
- System RAM: 32 GB+ recommended
- OS: Windows 10/11 64-bit
Why do I need to download Meta Llama 3 8B Instruct separately?
Meta Llama 3 8B Instruct serves as the semantic text encoder for kinematic prompts. Due to Meta's gated license terms, third-party software cannot redistribute model weights. You simply download the weights once from Hugging Face and point MotionSmith to your local folder.
What is NVIDIA Kimodo's role in MotionSmith?
MotionSmith builds upon the open-source NVIDIA Kimodo diffusion framework, wrapping it into a production-ready Unreal Engine 5.8 workflow with timeline authoring, IK retargeting, and in-engine authoring tools.
How do I test if my setup is ready before generating?
Open Editor Preferences ➔ Plugins ➔ MotionSmith and click Run Pre-Flight Diagnostics. It automatically tests your CUDA drivers, embedded runtime, and Llama 3 model path integrity.
4. Commercial Rights, Marketplace & Support
Licensing terms, Fab availability, and customer care.
Can I use generated animations in commercial games and films?
Yes. All UAnimSequence assets generated using MotionSmith in your Unreal Engine projects are 100% royalty-free for commercial video games, virtual production, cinematics, and interactive experiences.
Where can I download MotionSmith AI?
MotionSmith AI is distributed exclusively through the Epic Games Fab Marketplace. The Get MotionSmith buttons on this website link directly to the official Fab product page.
Which Unreal Engine versions are supported?
MotionSmith AI v1.0 is compiled and fully verified for Unreal Engine 5.8. Updates for future engine releases will be provided via Fab.
How do I get technical support or report bugs?
For setup assistance, pipeline questions, or bug reports, email our engineering team directly at motionsmithai@gmail.com. Please attach your Unreal Engine log from Saved/Logs/MotionSmith.log for faster diagnostic turnaround.
Explore Our Detailed Guides
Check the step-by-step workflow guide or view real-world prompt choreography examples.
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