Faces & Avatars

Identity is the hard problem in AI characters, and the most satisfying one to solve. Start with training a character LoRA (the identity foundation everything else stands on), then add a synced mouth and a 3D body.

Free Local HeyGen: The Four-Model Chain Behind Every Talking Shot on This Channel

For five weeks we would not say how our presenter’s talking footage is made. Here is the whole chain: LongCat for the body, MuseTalk for the mouth, Duix to clean up what that leaves, and MuseTalk again for the visemes. Why the order matters more than any single model.

Build a Local AI Companion with a Real Face (Ollama → Talking Avatar)

The bridge nobody documents: connect a local Ollama brain to a real-time 3D VRM face with voice, lip-sync and expressions. The four services, the ports they talk on, and the two traps that cost us days, the thinking-mode stall and the open-mic mistake.

Duix / HeyGem: The Open-Source HeyGen Clone, Tested

Duix (formerly HeyGem) is the open-source HeyGen clone, it clones a face from a short video and re-lip-syncs it to any audio, offline on an NVIDIA card. We installed it and ran it. Here’s the honest result.

InfiniteTalk: Unlimited-Length Local Lip-Sync (Almost)

InfiniteTalk promises infinite-length talking video from a portrait and audio, running in ComfyUI. It looks very good, but on a 32GB card the ‘infinite’ part isn’t practical yet. Here’s the honest state.

LongCat Avatar: The Best Local HeyGen Competitor (Full-Body, Free)

LongCat animates a whole body, gestures, lean, face, mouth, from audio, locally, for free. Long takes in one job. It’s our pick for a full-body local host, with two honest caveats: a quiet background, and drift on very long takes.

LTX LipDub / LatentSync: High-Res Audio-Driven Dubbing

LTX’s native audio dub is the highest-resolution lip-sync we’ve run locally, but the generative mode invents a made-up language unless you wire the true audio-driven path. Here’s how it works and where it slips.

Sonic Lip-Sync: Why We Rejected It (Watch the Eyes)

Sonic makes lips sync from an image and audio, but it regenerates the whole face every frame, so the eyes roll, irises drift, and teeth get reinvented. Here’s why it’s unshippable for a recurring character.

One AI Brain, Many Faces and Voices

Our presenter, her news-anchor self, and every character voice in our videos share infrastructure: one local LLM, swappable voices, swappable faces. The architecture that makes characters cheap.

Train a Character LoRA: Make Your AI Character Look the Same in Every Image

The complete recipe behind our presenter’s locked identity. Dataset rules, local AI Toolkit vs cloud Civitai training, the strength dials that matter, and the four rules we paid to learn.

Build a Local Talking AI Avatar: The Complete Architecture

The full blueprint for a fully-local AI companion, speech in, animated talking character out, running on one consumer GPU. This is the map; every stage links to a hands-on guide.