Avatar SDK Avatar API vs CharacterStudio

Avatar SDK Avatar API turns a photo into a rigged 3D avatar through a REST API. It offers realistic or cartoon styles and head or full-body pipelines, returning GLB, glTF or FBX models with facial blendshapes. Full-body avatars also include a skeleton and are compatible with Mixamo animations and real-time lip-sync through LiveSpeak. The output is described as compatible with Unity, Unreal Engine, Blender, three.js and Babylon.js. Full-body generation takes about 40 seconds and runs asynchronously: an application submits a photo and polls for the completed model. The API can run as a hosted cloud service or on-premise using Local Compute inside customer infrastructure. Enterprise Cloud REST API access is priced according to customer volume; a 7-day trial is listed, with no free plan. Access uses OAuth 2.0 tokens. Documented limits are 75 requests per minute per unique PlayerUID in Client access mode and 150 per minute per account in Developer access mode. The maker recommends clear, front-facing photos with even lighting and a neutral expression or slight smile.

CharacterStudio is a free browser toolkit for creating and optimizing 3D VRM character avatars. You can build characters with preloaded traits, point-and-click controls, a color picker, your own models and textures, or a manifest.json file. Imported models must use VRM format, with version 0.0 recommended. Texture replacement works by dropping an image into the browser, ideally using UVs that match the base mesh. Creations export as GLB, VRM, or screenshots, and programmable animations are listed. A one-click optimizer can merge skinned meshes and atlas textures; the documentation says this can reduce an avatar to one draw call. Batch export can randomize outputs or follow metadata schemas. Rendering uses Three.js and WebGL. The code is open source under the MIT license. JSON assembly and export is documented for batch Anata VRMs but remains a work in progress for general use.