FIT MIT WITH — 3D ANATOMY ATLAS: SOURCES, LICENSES AND CHANGES
Notice revised 2026-09-13

The muscle atlas rendered in this app (assets/anatomy/full-body-male-mobile.glb,
full-body-female-mobile.glb, full-body-map.json and female-muscle-map.json) is
Adapted Material derived from openly licensed anatomy. These files are
distributed under the Creative Commons Attribution-ShareAlike 4.0 International
license: https://creativecommons.org/licenses/by-sa/4.0/
Only these model files are CC BY-SA; the rest of the app is licensed separately.

CREDITS (wording requested by the licensors)

  "Z-Anatomy - The libre 3D atlas of anatomy - CC-BY-SA 4.0"
  https://github.com/Z-Anatomy/Models-of-human-anatomy
  Authors: Kousaku Okubo (original model BodyParts3D), Gauthier Kervyn
  (design, 3D, anatomy), Marcin Zielinski (Blender add-on) and the
  contributors named in the upstream License.txt.

  "BodyParts3D - The Database Center for Life Science - CC-BY-SA 2.1 Japan"
  (the license under which Z-Anatomy obtained the geometry)
  https://creativecommons.org/licenses/by-sa/2.1/jp/

  "BodyParts3D, © The Database Center for Life Science licensed under
  CC Attribution 4.0 International"
  (the credit line the Database Center for Life Science requests today)
  https://dbarchive.biosciencedbc.jp/en/bodyparts3d/download.html
  https://creativecommons.org/licenses/by/4.0/

SOURCE

  Z-Anatomy.zip from the repository above, SHA-256
  E029688545627BD0214B269E1063143ABB580AAD72B2C2445D6D8A9A0D9DA736,
  processed with Blender 5.1 on 2026-09-11 and 2026-09-12.

CHANGES MADE

  - Extracted only the skeletal muscles, the supporting skeleton, head/hand/
    foot context muscles and connective tissue. Removed the source scene
    hierarchy, materials, text definitions, scripts and textures.
  - Excluded the separately licensed content bundled with Z-Anatomy (brain,
    cranial nerves, inner ear, kidney). None of it appears in these files.
  - Assigned stable muscle IDs (218 regions: 109 muscles, left and right),
    training-group and layer metadata as glTF node extras.
  - Reduced the polygon count to a mobile budget (about 129,000 triangles),
    validated meshes, applied smooth shading, converted Blender Z-up to glTF
    Y-up and exported GLB files.
  - Female variant: an artist-authored deformation of the male geometry
    (about 1.63 m tall) with unverified proportions, plus two illustrative
    breast-context meshes that carry no muscle IDs. It is not independently
    sourced female anatomy.
  - Neither model has been reviewed by an anatomy specialist. Colors shown in
    the app are training estimates, not measured muscle activation.

PUBLIC COPY (ShareAlike)

  The adapted models, maps, this notice and the Blender build scripts are
  published under CC BY-SA 4.0 at
  https://github.com/slfresh/fitmitwith-anatomy-atlas