Convai Asset Uploader: Turn your custom MetaHuman & Reallusion avatars into AI teammates

By
Convai Team
October 14, 2025

TL;DR: Convai’s Asset Uploader lets you bring your own MetaHuman, Reallusion, and any other custom avatars from Unreal Engine into Convai’s AI Experience Ecosystem, ie. Avatar Studio and Convai Sim; no complex setup required. You start by crafting your avatar’s mind in the Convai Playground, link it with your 3D model in Unreal, and upload directly into Avatar Studio, Convai Sim, or your Unreal projects. From there, you can add actions (via Convai’s XR Animation Capture App or Epic’s Fab animations) and even drop your character into custom environments for richer, more realistic experiences. The result: fully personalized, AI-powered digital humans ready for training, simulation, and brand experiences—built once, deployed anywhere.

Watch the step by step tutorial here to get started:

Why Custom Assets Matter?

Real teams don’t all look the same and your virtual humans shouldn’t either! Whether you’re building an onboarding assistant, a tour guide, a retail associate, or a brand ambassador, custom avatars lift engagement, memorability, and trust. You can reflect uniforms, age ranges, cultures, and roles; you can also tune body language and voice to match context (calm for healthcare, energetic for retail, authoritative for security). The result: better training outcomes and richer customer interactions.

A Quick Refresher on Convai

Convai is an end‑to‑end platform for AI characters. You author the “mind” in the Convai Playgroundlanguage, voice, knowledge, memory, and behavior, and then drop that character into high‑quality avatars and interactive 3D experiences. You can go no‑code with Avatar Studio and Convai Sim for fast prototyping and deployment, or integrate directly in Unreal Engine when you want full control. The Asset Uploader ties those worlds together: it packages your custom assets and sends them to Convai—ready for web and XR. 

Shape the Mind of Your Avatar 

Start in Convai Playground:

  • Define the character: name, description, personality traits, language/voice, and knowledge.

  • Iterate quickly: test conversations in the browser with Avatar Studio’s video call experience and version your changes safely.

Once you like how the character thinks and talks, you’ll pair it with your visual asset. (You can do the same “mind first, visuals later” flow for both MetaHuman and Reallusion pipelines.) 

Enable Your Custom Asset with AI

In Unreal, pair your character’s “mind” to your custom avatar:

  • Add Convai’s chat component to your avatar Blueprint and paste in your Character ID from Playground to test speech, lipsync, and basic behaviors. The MetaHuman and Reallusion upload guides both show this quick verification step with the BP_ConvaiChatbotComponent.

This is the moment your avatar stops being a static model and starts behaving like an AI teammate.

Furthermore, check out our detailed asset uploader documentation in case you’re struggling with any of the steps above.

Bring Your Custom Avatar Into Avatar Studio & Convai Sim…or Keep it in Unreal

Use the Asset Uploader to send your MetaHuman or Reallusion avatar from Unreal straight to Convai. The tool automates project setup, plugin integration, packaging, and upload so you can focus on quality—not build scripts. 

Note: The Asset Uploader is currently available only with the Professional Plan and above. Check out the pricing page to learn more.

After upload:

  • Avatar Studio: find your avatar under Upload Your Custom Avatar, then style lighting, tweak interface, and publish a shareable, no‑code experience.

  • Convai Sim: place your avatar into an interactive 3D scene for walk‑throughs, practice, and role‑play simulations.

  • Unreal Engine: prefer to stay native? Install the Convai UE plugin, set your API key, and keep building in your project.

  • Bring Your Avatars to Your Website: With simple pixel-streaming embeds, bring your AI avatar led experience to your browser–no GPU needed. Read more about it on the Convai Pixel Streaming Embed documentation.

Add Actions and Motions: Two Easy Workflows

Actions make your avatar do things (gesture, point, wave, inspect an object) at the right moments in conversation.

A) Drop‑in animations from Epic’s Fab
Open Fab directly inside Unreal and pull in animation packs (free and paid) to expand your library fast. Fab is Epic’s unified marketplace (successor to UE Marketplace, Sketchfab Store, and home for Quixel Megascans) and is accessible from the UE Editor’s Fab window

B) Record your own in minutes (XR capture)
If you need brand‑specific gestures or role‑specific moves, record custom clips in VR using the Convai XR Animation Capture app on Meta Quest, then assign them to your avatars in Convai. It’s a lightweight way to build a reusable animation library, no mocap suit required. To get started, check out the detailed XR animation documentation.

The Benefits of Custom‑Avatar‑Led Experiences

  • Realism & rapport: human‑like presence improves retention in training and increases dwell time in marketing.

  • Brand fidelity: uniforms, accessories, and spaces match your real world.

  • Transferable skills: simulations mirror field conditions, helping learners practice the right moves.

  • Future‑proofing: once your “mind” is set, you can swap avatars, voices, and environments without re‑authoring dialogue.

Yes, You Can Add Custom Environments

There are two complementary routes:

  • Upload Scenes from Unreal with the Asset Uploader when you want fully custom worlds. (Coming Soon)

  • Pick built‑in environments in Avatar Studio when speed matters: office, kiosk, sci‑fi room, cozy lounge, and more; to give conversations the right context.

FAQs

What does the Asset Uploader actually do?
It creates a Convai‑ready Unreal project, installs required Convai plugins, compiles, packages, and uploads your asset, so it appears in Avatar Studio/Convai Sim. 

Which assets are supported today?
You can upload MetaHuman, Reallusion and any other avatar easily. The page also references Scenes; review the doc for current support details. 

What are the prerequisites?
Prerequisites include: Unreal Engine 5.5, a Convai API key, .NET 6.0 runtime (Console Apps), the UE 5.5 Cross‑Compile Toolchain, and Linux binaries via Epic Games Launcher. 

How do I connect my custom avatar to the AI “mind”?
In Unreal, add the Convai chatbot component to your avatar Blueprint and paste your Character ID to test speech and lipsync, then upload. Both MetaHuman and Reallusion guides show this flow. 

Where will my uploaded avatar show up?
In Avatar Studio under Upload Your Custom Avatar, ready to use in experiences. 

Can I keep everything in Unreal?
Yes. Install the Convai Unreal plugin, set your API key, and run fully native. 

Can I add animations without a mocap?
Yes. Pull animations from Fab directly inside Unreal, or record your own with the Convai XR Animation Capture app on Meta Quest.

Which plan includes the Asset Uploader?
Professional Plan and above. 

In conclusion

Your process is simple: author the mind in Convai, bring your own MetaHuman/Reallusion visuals, pair them in Unreal, and upload—then ship a polished experience in Avatar Studio, stage dynamic practice in Convai Sim, or keep building natively in UE. When you’re ready to add nuance, layer in actions (Fab or XR capture) and environments (built‑in or custom scenes).

Start with the Asset Uploader and you’ll cut days of glue work down to minutes—so your time goes into performance, not pipelines. 

Quick links to the docs you’ll lean on