Aethos · Avatar · by STK Engineering Sovereign digital humans · 2026

Digital humans.
Sovereign presence.

MetaHuman NPCs with 52 ARKit blendshapes, real-time emotion synthesis and lip-sync — on your infrastructure, behind your firewall, under your control.

Deploy your avatar See use cases
I · CAPABILITIES Not a chatbot. A presence.

Not a chatbot.
A presence.

A

MetaHuman Rendering

Unreal Engine 5 MetaHuman pipeline. Cinema-quality faces at real-time framerates. Every pore, every micro-expression, rendered locally.

B

52-Channel Facial Animation

Full ARKit blendshape set. Eyebrow raises, jaw tension, lip corners — the full emotional spectrum, driven by AI in real-time.

C

Real-Time Lip-Sync

Audio-to-viseme mapping with sub-frame latency. Supports multiple languages without retraining. Powered by NeuroSync.

D

Emotion Synthesis

Context-aware emotional responses. The avatar doesn't just speak — it reacts. Surprise, empathy, concentration, mapped from conversation context.

E

Voice-Driven Animation

Direct pipeline from TTS output to blendshape drivers. No pre-baked animations. Every utterance is unique.

F

On-Premise Rendering

GPU-accelerated rendering on your hardware. No cloud dependency. No frame leaves your network.

II · USE CASES Where avatars create value

Where avatars
create value.

CASE 01

Corporate Training & Onboarding

AI trainers that adapt to each learner, demonstrate procedures, answer questions in real-time. Consistent quality, unlimited patience, every language.

CASE 02

Live Event Co-Hosts

AI avatars as stage presenters for conferences, exhibitions, product launches. Multilingual, scriptable, interactive with audiences. BEA World 2× Gold winner.

CASE 03

Customer-Facing Kiosks

Information terminals in banks, public offices, museums, airports. A face instead of a form. Accessible, multilingual, always available.

CASE 04

AR/VR Training Simulations

Immersive scenarios for healthcare, security, emergency response. NPCs that behave realistically, respond to trainee actions, provide feedback.

III · THE PIPELINE From text to presence in milliseconds

From text to presence
in milliseconds.

Six stages transform a text prompt into a living, breathing digital human — rendered locally, in real-time, with full emotional fidelity.

01

Text Input

User prompt or scripted dialogue enters the pipeline as plain text.

02

LLM Response

Language model generates contextual, emotionally-tagged reply text.

03

TTS Synthesis

Text-to-speech engine produces natural audio with prosody and emotion.

04

Viseme Mapping

Audio is analysed frame-by-frame to extract phoneme-to-viseme mappings.

05

Blendshape Drive

52 ARKit blendshapes are driven in real-time — lips, eyes, brows, jaw.

06

Real-Time Render

Unreal Engine 5 renders the final MetaHuman frame on local GPU hardware.

IV · REFERENCE Recognised on the world stage

Twice gold.
On stage.

BEA World Festival II × Gold 2024
Best Event Awards · International Jury

Aethos avatars hosted the Austrian Tourism Day 2024 as live co-hosts on the polySTAGE at the Austria Center Vienna — immersive, multilingual, in front of an industry audience. Recognised by the international jury of the Best Event Awards in two gold categories.

Award
2× Gold · BEA World 2024
Stage
polySTAGE · Austria Center Vienna
Occasion
Austrian Tourism Day 2024
Role
AI avatars as live co-hosts
V · GET STARTED Deploy your sovereign avatar

Begin where it
proves itself.

Ready to deploy sovereign digital humans on your infrastructure? Tell us about your use case and we'll set up a demo tailored to it.

Vienna, Austria
office@stk-engineering.com
Ferrogasse 59, 1180 Wien
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Chalandri, Greece
office@stk-engineering.com
Nestoros 1, 15231 Chalandri
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