I made buch of keys with the help of blender software. It has 12790 faces 26172 verts 26172 trisi I rendered with cycles and eevee enginees. Image at preview.
BLEND (Blender, filesize: 5.54 MB), BLEND (Blender, filesize: 5.54 MB), OBJ (OBJ, filesize: 1.4 MB), PY (Python Script, filesize: 10.5 KB), DAE (Collada, filesize: 2.03 MB)