BodyParts3D, © The Database Center for Life Science licensed under CC Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Current dataset license: https://dbarchive.biosciencedbc.jp/en/bodyparts3d/lic.html Legacy OBJ headers mention CC BY-SA 2.1 Japan; the current archive license and README specify CC BY 4.0 (license page updated 2025-02-27). Dataset: BodyParts3D 4.0, IS-A Tree, polygon reduction rate = 99%. https://dbarchive.biosciencedbc.jp/en/bodyparts3d/download.html Right-sided partial forearm subset: radius, ulna, anconeus, brachioradialis, humeral and ulnar heads of pronator teres. Source files are the same as those used in the elbow study. No extra anatomical geometry is invented, cropped, repositioned or deformed. Changes: OBJ to JSON conversion, computed smooth normals, illustrative colors. See provenance.json for exact original mesh and output checksums. Not a complete forearm: most muscles, hand, interosseous membrane, ligaments, cartilage, nerves and vessels are omitted. Muscle ends may extend beyond this bone-only context because proximal attachment bones are not included. This is a static pose, not a motion simulation, clinically reviewed atlas or surgical planning model.