Sith holocrons were devices used by the Sith that were capable of containing information. Although their function was similar to that of Jedi holocrons, they usually were pyramids or tetrahedrons, whilst the Jedi holocrons were of cuboid shape, and were accessible only to those who were able to control the dark side of the Force. The Jedi Order considered these to be some of the most dangerous artifacts in the galaxy.

Info Link: http://starwars.wikia.com/wiki/Sith_holocron

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Sith Holocron (Star Wars)

3D scan of a taxidermized dwarf crocodile (*Osteolaemus tetraspis*). Dwarf crocodiles are the smallest species of crocodiles, reaching a maximum body and tail length of ca. 1.7 meters. *O. tetraspis* is an inhabitant of small rivers and pools of freshwater in forests and swampy regions of Western and Central Africa northern Angola and east of the Congo River. 

This specimen cannot be found in the exhibition of the NHM Vienna. Hall 28 of the NHM Vienna is full of other reptiles and 3D models, some of them are visible in the collection [NHMW 1st Zoological Department](https://skfb.ly/ooFCT). 

**Specimen**: *Osteolaemus tetraspis* (Cope, 1861)

**Inventory number**: NHMW-ZOO-HS-1974

**Collection**: Natural History Museum Vienna, 1st Zoological Dept., Herpetology Coll. (curator: Silke Schweiger)

Find out more about the NHMW [here](http://www.nhm-wien.ac.at/en).

Scanned and edited by Anna Haider (NHMW)

Scanner: Artec Space Spider. Infrastructure funded by the FFG.

Dwarf Crocodile (NHMW-ZOO-HS-1974)

Micro CT scan of a capercaillie skull from the D’Arcy Thompson Zoology Museum at the University of Dundee.

DUNUC 1609. Tetrao urogallus - Capercaillie. Length=9cm.

Scanned with a Nikon XT H 225ST micro CT scanner. The resulting file is exported as an stl. and imported in to Zbrush. Texture is added from photographs using the Spotlight function and Polypainting.

We’d love to hear from you if you download or print our models, especially if you use them in education and outreach.

Capercaillie skull

Eusthenopteron est un genre éteint de sarcoptérygiens, le poisson fossile le plus connu pour son anatomie proche du groupe des tétrapodedire. Il a vécu il y a 385 millions d'années, au Dévonien supérieur

Eusthenopteron

The PlayStation All-Stars armor model was originally posed differently from the Future Saga Ratchet models. The character stood with slightly bent knees and a forward lean, which prevented it from aligning correctly with the Future-era neutral stance.

To correct this, the mesh was manually adjusted rather than relying on the original armature, which produced poor deformation. Using symmetrical sculpting, the model’s posture was gradually refined until the knees, torso, and overall stance matched the Future Saga base pose.

Additional manual adjustments were also required to align the fingers so that the hands match the orientation expected by the Future Saga rigs.

As a result, the model’s proportions and neutral pose now closely match those used by the Future Saga characters. In theory, this means the Future Saga armature and animations should be compatible with the model. However, the model is currently released without an armature; a Future Saga rig may be applied later when I have time.

Tetrafiber Armor P.S.A.S

It turns out that [the second orthogonalized tetrahedron](https://skfb.ly/pH6VB), together with half as many cubes, will fill space even without its mirror twin.

This cube-like cluster of 64 orthogonalized tetrahedra and 32 cubes is the smallest cluster I have found so far that will tile by translation.

64-cluster

Zoomorphic effigy vessel, tetrapod, Ulúa style, carved in alabaster or marble. The vessel features two perimeter grooves below the rim and a basal molding. Two bird heads, with open eyes and closed beaks, extend from the wall functioning as handles.

 IDAEH Cultural Property No. 1.2.159.0041
 
www.fundacionrutamaya.org

Special thanks to the staff of La Ruta Maya Foundation for their hard work on this project.

3D model made in RealityScan; Total # of images: 342

Alabaster or Marble Bowl with Handles

TETRA

Polychrome cylindrical vase with a flat base. The surface is divided into three horizontal bands, the central one being the narrowest of the three. Each band is decorated with tetrapetaled flowers in black and orange. The color scheme alternates: the upper and lower bands feature black flowers on an orange slip, while the central band is painted black with the floral silhouettes left in the natural color of the slip, in a stencil-like technique. The entire composition is framed by a red horizontal band above and below the rim, as well as an additional horizontal band encircling the base.
 IDAEH Cultural Property No. 1.2.179.0149
www.fundacionrutamaya.org

Special thanks to the staff of La Ruta Maya Foundation for their hard work on this project.

3D model made in RealityScan; Total # of images: 384

Alabaster or Marble Bowl

- exactly what the title says
- AX4, or sp3, whatever you prefer
- red and blue balls can represent differnet substituents
- modeled on 10/2024
- tetrahedral according to VSEPR

Tetrahedral sp3 Hybridized Carbon Model

You can combined the [orthogonalized tetrahedron 2](https://skfb.ly/pH6VB) with three sixths of a cube, to obtain a polyhedron that can fill space, though apparently only in a fairly complicated way.

Combined polyhedron

Chablekal tetrapod bowl with divergent walls, a convex base, basal molding, and spherical supports. The exterior wall is decorated with two panels, each featuring an incised spider monkey (Ateles geoffroyi) seated in right profile, with the tail coiled yet extended backward and the arms positioned forward with the hands in front. The surrounding field is filled with parallel incised lines oriented in different directions. Provenance: the Verapaz region.

 IDAEH Cultural Property No. 1.2.144.1504
 
www.fundacionrutamaya.org

Special thanks to the staff of La Ruta Maya Foundation for their hard work on this project.

3D model made in RealityScan; Total # of images: 347

Chablekal Tetrapod Bowl

Tetrapod Effigy Plate (Usulután Style), light orange in color with mammiform supports. The decoration includes a mid-rim panel featuring a zoomorphic effigy of a batrachian (frog or toad) with open eyes gazing upward and a closed mouth. NAA of the paste indicates the origin or manufacturing area in western El Salvador.

IDAEH Cultural Property No. 1.2.144.0874

www.fundacionrutamaya.org

Special thanks to the staff of La Ruta Maya Foundation for their hard work on this project.

3D model made in RealityScan; Total # of images: 466

Tetrapod Effigy Plate, Usulután Style

Tetrapodo DMT

This is a cluster of eight [second orthogonalized tetrahedra](https://skfb.ly/pH6VB) and six cubes, which forms the heart of the [64-cluster](https://skfb.ly/pHGvX).

octahedral-cluster

Tetrapod zoomorphic effigy bowl in the form of an aquatic bird reclining on its back. The head is attached to the rim, featuring a long beak, round eyes, and a curved neck. The wings and tail are attached to the rim. The vessel has a cream-colored ground and button-shaped supports.
 IDAEH Cultural Property No. 1.2.144.0908
www.fundacionrutamaya.org

Special thanks to the staff of La Ruta Maya Foundation for their hard work on this project.

3D model made in RealityScan; Total # of images: 299

Tetrapod Bowl in form of Aquatic Bird

Monochrome black tetrapod bowl with a composite silhouette, featuring mammiform supports with perforations and rattles. It has a well-defined lip molding. The bowl dates to the Protoclassic period and originates from the Central Highlands of Guatemala, specifically the Kaminaljuyú area.

 IDAEH Cultural Property No. 1.2.144.0451
 
www.fundacionrutamaya.org

Special thanks to the staff of La Ruta Maya Foundation for their hard work on this project.

3D model made in RealityScan; Total # of images: 344

Mammiform tetrapod bowl

Tetrapod bowl with two horizontal flange-like projections at mid-wall. Traces of red and white paint remain.
According to the Museo Príncipe Maya, which previously held the piece in custody and on display, this bowl was found in a cave context containing two miniature figurines: a pregnant woman and a small child, registered under  IDAEH Cultural Property No.  16.5.1456 and 16.2.5.1457, respectively.

 IDAEH Cultural Property No.  16.2.5.1455
 
www.fundacionrutamaya.org

Special thanks to the staff of La Ruta Maya Foundation for their hard work on this project.

3D model made in RealityScan; Total # of images: 231

Bowl

3D Print of TetraPods

Tetrapod bowl with divergent walls and a concave base. It features mammiform supports with perforations and rattle elements. The surface is decorated with two spider monkeys (Ateles geoffroyii) modeled in relief, placed on opposite sides of the vessel, with arms and legs extended in an ascending posture, as if climbing the wall of the vessel. The ceramic is orange in color with Usulután-style decoration, but it was later covered with polychrome stucco (green, red, black, white, and yellow), a tradition that began at Kaminaljuyú during the Early Classic period. The stucco decoration displays geometric figures and volutes. The vessel and its original ceramic decoration date to the Late Preclassic period.  
 IDAEH Cultural Property No. 1.2.144.1010
www.fundacionrutamaya.org

Special thanks to the staff of La Ruta Maya Foundation for their hard work on this project.

3D model made using Artec Leo

Bowl l with Spider Monkey Relief Decoration

BTC Polychoron is a data-sculpture generated from Bitcoin market history by embedding the time series into R⁴, computing the 4D convex hull boundary (a polychoron “envelope”), then mapping it into 3D via stereographic projection. 

The result is a single continuous object whose surface encodes extremes/regime structure rather than average behavior: the hull captures the outer geometry of the dataset and turns it into a readable form.

Topology 4D edge (ConvexHull in R⁴):

V = 28,432 (vertex hull 4D)

E = 201,583

F = 346,302 (triangular faces)

C = 173,151 (tetrahedric cells 4D)

χ₄ = V − E + F − C = 0

This model contains 500,000 vertices and 346,302 faces. Vertex color encodes the original data channels: R ≈ 4th-dimension depth (w), G ≈ normalized price, B ≈ time gradient, producing a chromatic field that reveals trajectory and regime shifts while rotating. 

Built procedurally (Python) as a true geometry pipeline, not a texture trick.

Period: 2017-08-17 → 2021-08-20 (UTC)

Price Range: ~$2,919 → ~$64,577

BTC Polychoron - 4D Convex Hull Projection

От мнохрома до тетрады, палитры

Retry School HW: mono to tetra

Dolní čelist tetřívka obecného (Tetrao tetrix) 
Bottom jaw of black grouse (Tetrao tetrix)

Tettrao tetrix - bottom jaw

Methane (US /ˈmɛθeɪn/ or UK /ˈmiːθeɪn/) is a chemical compound with the chemical formula CH4 (one atom of carbon and four atoms of hydrogen). It is a group 14 hydride and the simplest alkane, and is the main component of natural gas. The relative abundance of methane on Earth makes it an attractive fuel, though capturing and storing it poses challenges due to its gaseous state under normal conditions for temperature and pressure.

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