A factual map of the open-source and commercial systems that build realistic and high-quality 3D avatars: Gaussian-splat heads, single-photo humans, text→avatar generators, and the rigs AXIS already animates. For each: what it makes, what it runs on, what its license permits, and exactly how AXIS uses it.
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Listings are reference material compiled from each project's own repository and paper, current as of June 2026. License summaries are guidance, not legal advice: confirm terms with the upstream project before any commercial use. Non-commercial research engines are linked for self-hosted and academic use and are deliberately not wired into the AXIS paid generation pipeline. The only token AXIS references is .