What AI hologram means
Search for “AI hologram” and you will find two very different ideas. One is a true volumetric display: specialized hardware that projects a three-dimensional image into physical space. The other is more practical for most teams: a real-time AI avatar composited into a screen, kiosk, transparent display, or AR surface so it appears to float in the interface.
This guide focuses on the second category. If you want a step-by-step physical display walkthrough, start with How to Make a Hologram Out of an AI Avatar.
Core components
A practical holographic-style AI avatar has three layers:
- The AI agent: your ASR, LLM, and TTS stack. SpatialWalk does not provide this layer.
- The avatar identity: a stock avatar or a custom avatar. SpatialWalk reference materials describe 3DGS avatar generation from a single photo, with model size around 5-10 MB and generation possible in as little as 3 hours.
- The rendering engine: the layer that turns audio into synchronized avatar motion and displays the avatar locally.
SpatialWalk sits in the third layer. It is the AvatarKit SDK and driving engine, not a replacement for your AI agent.
Why rendering architecture matters
Traditional cloud-rendered avatar systems stream full video to the user. Reference materials use 1-2 MB/s as the traditional cloud-rendering video stream benchmark, with traditional cloud-rendering latency above 3 seconds.
SpatialWalk uses a cloud-and-edge architecture. The cloud side performs lightweight driving inference and sends a 10-20 KB/s driving-data stream to the SDK. The client SDK renders the 3DGS avatar and aligns audio locally. That is why SpatialWalk can publish:
- End-to-end latency: <1.5 seconds, depending on the connected voice AI stack
- Additional audio-to-digital-human interaction latency: <300 ms
- Device coverage: 99% of mainstream Android, iOS, and Web devices
This is also why holographic-style deployments are realistic on web, mobile, and low-bandwidth hardware surfaces.
How to build one
- Choose the display surface. Most teams start with a web or mobile overlay. Kiosks, transparent screens, and AR surfaces can follow once the interaction model is validated.
- Connect your AI stack. Your application remains responsible for ASR, LLM, and TTS.
- Initialize the avatar SDK. Use the SpatialWalk Web, iOS, or Android SDK depending on the target surface.
- Render the avatar as a separate layer. SpatialWalk supports native 3D layer separation so the avatar can sit over slides, dashboards, or real-time interfaces.
- Test on the real target device. Use the SpatialWalk playground before committing to a production integration.
For SDK-level testing, see Avatar SDK Demo: How to Test a Real-Time AI Avatar Before You Commit to a Platform.
SpatialWalk specs
- Rendering architecture: lightweight cloud driving inference plus on-device rendering
- Data stream: 10-20 KB/s driving data
- End-to-end latency: <1.5 seconds depending on voice AI stack
- Additional avatar interaction latency: <300 ms
- Model technology: 3D Gaussian Splatting
- Model size: approximately 5-10 MB
- Custom avatar input: single photo
- Platform SDKs: Web, iOS, Android
- LiveKit Plugin: Web only
- Included avatar: commercial-free high-fidelity avatar included
Further reading
- How to Make a Hologram Out of an AI Avatar — a practical implementation tutorial
- Avatar SDK Demo — how to test the SDK before committing
- Interactive Avatar Complete Guide — the broader real-time avatar category
- 7 Best Platforms Like Synthesia — the async and real-time avatar platform landscape
FAQ
Is an AI hologram the same as a real holographic display?
Not usually. In product discussions, “AI hologram” often means a real-time avatar rendered into a screen, kiosk, transparent display, or AR surface. True volumetric displays are a separate hardware category.
Does SpatialWalk provide the AI brain?
No. SpatialWalk does not provide ASR, LLM, or TTS. It provides the avatar rendering and driving layer.
What bandwidth does SpatialWalk require?
SpatialWalk uses 10-20 KB/s of driving data. The traditional cloud-rendered video stream benchmark in the reference material is 1-2 MB/s.
Build and test a holographic-style avatar with SpatialWalk Try the playground , or ，或 Read the docs 。