# Anatomical model attribution

Anatomical models are adapted from **Z-Anatomy — The libre 3D atlas of anatomy**, licensed under **Creative Commons Attribution-ShareAlike 4.0 International**.

- Project: https://github.com/Z-Anatomy/Models-of-human-anatomy
- Pinned source commit: `0752b0e5c71f8a553115d797a5d321f7a77f8d82`
- Source archive: https://raw.githubusercontent.com/Z-Anatomy/Models-of-human-anatomy/0752b0e5c71f8a553115d797a5d321f7a77f8d82/Z-Anatomy.zip
- License: https://creativecommons.org/licenses/by-sa/4.0/
- Source license and individual attribution notices: [UPSTREAM-LICENSE.txt](UPSTREAM-LICENSE.txt)

**BodyParts3D — © The Database Center for Life Science — CC BY-SA 2.1 Japan**, as credited by this exact Z-Anatomy release. This distribution retains the upstream notice rather than substituting a license associated with a different release of BodyParts3D.

Original BodyParts3D model: Kousaku Okubo. Z-Anatomy design, 3D and anatomy: Gauthier Kervyn. The upstream notice lists further contributors, application authors and individual reference assets.

## Modifications for 集合吧，人體！

The selected source objects were evaluated in Blender with embedded scripts disabled, converted from Z-up to Y-up using one shared rotation, grouped into eight base web packages and two optional variants, and assigned new materials. Bone and soft-tissue positions, scale and anatomical proportions were not independently changed. Soft-tissue subdivision was disabled for efficient export; the source oesophagus curve was evaluated as a mesh. The new GLB model derivatives are distributed under CC BY-SA 4.0 with the original attribution notices retained.

- `z-skull.glb`: 22 skull bones, 6 auditory ossicles, the hyoid bone and 28 teeth; 57 separately selectable units. No wisdom teeth are included in this source selection.
- `z-ribs.glb`: 24 ribs, 20 corresponding costal cartilage meshes, and 3 source sternum meshes. The game groups the sternum into one assembly unit and associates each costal cartilage mesh with its corresponding rib.
- `z-spine.glb`: 7 cervical, 12 thoracic and 5 lumbar vertebrae, the sacrum and coccyx; 26 units.
- `z-pelvis.glb`: the left and right hip bones, sacrum and coccyx; 4 units.
- `z-arm.glb`: the right clavicle, scapula, humerus, radius and ulna; 5 units.
- `z-hand.glb`: 8 right carpal bones, 5 metacarpals and 14 phalanges; 27 units.
- `z-leg.glb`: the right femur, patella, tibia and fibula; 4 units.
- `z-foot.glb`: 7 right tarsal bones, 5 metatarsals, 14 phalanges and the source foot sesamoid group; 27 units.
- `z-skull-brain.glb`: all 57 head/neck units plus left and right cerebral cortex groups, cerebellum, midbrain, pons and medulla oblongata; 63 units. Source brain objects are grouped into 6 assembly units, not every individual brain structure.
- `z-ribs-organs.glb`: all 25 rib-cage units plus heart, left and right lungs, trachea, oesophagus and diaphragm; 31 units. The optional soft-tissue variants use 188 evaluated source objects grouped into 12 units, with pink and organ-specific material colors.

The limb packages intentionally use only the right side. The sacrum and coccyx are reused in both the spine and pelvis packages at identical source coordinates. Per-level unit counts include teeth, grouped meshes and reused bones, and must not be added up as a human skeletal bone count.

The source archive is available above; the modified model files are directly downloadable from this directory. `manifest.json` contains object identifiers, original names, model hashes, positions and the game distance/relationship data. `geometry-audit.json` describes the sampling method and its limitations.

The game uses its own interaction code and material setup. It does not embed the commercial Human Anatomy Atlas assets or the Z-Anatomy Blender application scripts. The full upstream reference notices are preserved; their inclusion does not assert that every reference asset is contained in these selected model packages.