ANATOMICAL ARM — WEBSITE ILLUSTRATION 1.4 — 2026-09-10

This is an adapted open anatomical model, not a copy of the Sketchfab artwork.

MODEL SOURCES
BodyParts3D — The Database Center for Life Science (DBCLS), Kousaku Okubo.
https://dbarchive.biosciencedbc.jp/en/bodyparts3d/desc.html
Z-Anatomy credits its BodyParts3D source as CC BY-SA 2.1 Japan.

Z-Anatomy — The libre 3D atlas of anatomy; Gauthier Kervyn and contributors.
https://github.com/Z-Anatomy/Models-of-human-anatomy
https://www.z-anatomy.com/
License: Creative Commons Attribution-ShareAlike 4.0 International.

Original atlas used for v1.1 bones, muscles and connective tissue:
Source revision: c7010a903b75a2fd24a13b1c2c4c3546a9223780
Source file: Z-Anatomy.zip / Z-Anatomy/Startup.blend
Extracted with Blender Python 4.5.3; bundled atlas scripts were not executed.

Browser-optimized source geometry: hpfrei, body-anatomy-3d-viewer.
https://github.com/hpfrei/body-anatomy-3d-viewer
Source revision: 0fc76a927aaf54c6fcc217cabdc3eb4d561130b7
Source file: public/body.glb
License: Creative Commons Attribution-ShareAlike 4.0 International.

MODIFICATIONS FOR THIS PROTOTYPE
Left upper-limb selection (104 components); transform baking; centering;
original atlas detail replaces the previously reduced bones and muscles;
nine original palm, wrist and finger connective-tissue structures added;
adaptive mild subdivision (two passes on finger/metacarpal bones, one on
other small structures and sheaths, none on larger original meshes);
muscle/tendon vertex colors and striation UVs; atlas prose metadata removed;
standalone viewer, lights, generated decorative surface texture and controls.

SKIN MODIFICATIONS — VERSION 1.4
The original 104 internal structures are unchanged. Nineteen exterior-region
meshes from the same pinned Z-Anatomy atlas were registered to the existing
arm, stitched with narrowly bounded seam repairs, subdivided and refined into
one outer surface. Native shoulder opening retained; no chest wall invented.
The atlas's Solidify modifiers were not used. There are no stacked skin shells.
Five native nail plates were refined and fitted along bounded dorsal rays,
preserving their tangential outlines. Local clearance refinements, restrained
joint/palm creases, skin/nail vertex colors and procedural material finishing
are derivative illustration, not a real-person scan or measured tissue layers.
The website adds a removable Skin group and an elbow camera preset. The
test-only shoulder cap is not part of the distributed or rendered model.
This skin/nail derivative remains CC BY-SA 4.0 with the sources above credited.

The derived model is distributed under CC BY-SA 4.0:
https://creativecommons.org/licenses/by-sa/4.0/
https://creativecommons.org/licenses/by-sa/4.0/legalcode
Preserve attribution and indicate modifications when sharing/adapting it.
No source author or institution endorses Nonicate or this prototype.

VISUAL REFERENCE ONLY (NOT THE SOURCE MESH)
Arm by AnatomyPhysiologySCC; modeled/textured by Indigo Perez.
https://sketchfab.com/3d-models/arm-4f4c0ade419f432593e6cc77f441f425
No Sketchfab mesh, texture, screenshot, or embed is distributed in this viewer.

LIMITATIONS
Not clinically validated, not a complete atlas, not a treatment/diagnosis tool.
Muscle striations and tendon color boundaries are illustrative art direction.
No nerves or blood vessels. Skin is an illustrative outer surface, not a
histological model. No armature, finger or elbow animation.
Camera orbit changes viewpoint; it does not simulate joint movement.

RENDERING ENGINE — THREE.JS
The MIT License
Copyright (c) 2010-2026 three.js authors

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.