Polymesh

Polymesh loads glTF 2.0 models in two forms: .gltf files that reference external buffers and textures, and .glb files with everything embedded. It can draw rigid models, deforming skins and blend-shape morphs, and it can read node transforms and glTF extras metadata. Morph target names taken from Blender shape keys can be looked up by name.

Animation playback is controllable, including speed and transitions between clips. Models can be selected for entities, block entities and items, with distance settings for the base model. Skin and morph deformation are calculated on the CPU. When the Iris or Oculus shader pack is active with the default setting, the renderer uses the Minecraft vertex consumer so that the pack controls lighting, and emissive, metallic and roughness textures are applied where the model defines them.

Polymesh can also calculate physics mesh collisions from the model geometry. A developer guide with registration examples and API options is included for mods that build on it. Only the client needs the mod, so servers run without it, and the license is the GNU Lesser General Public License v3.0 or later, with the source code public.