Free 4K model of a weathered cast-iron round manhole cover, embossed "WATER" with radial segmented pattern and a worn, rusted patina.

Water Manhole Cover

Making progress on underwater scenes ( but still more to come :) ) !

[Original scan](https://skfb.ly/6suDz) from @ariosgeo, and inspiration from [Il Cristo degli Abissi](https://goo.gl/RU5PtJ), a submerged statue of Jesus in Italy.

**Modeling**:

* The scan was remeshed with [mmgs](http://mmgtools.org) from 500k verts to 7k, keeping the face and hands at a higher resolution.
* The ocean surface and ground were created with blender's ocean modifier.
* Light shafts are simply a randomized array of elongated planes.
* The fish is a lowpoly model ( a 30s model ).
* A particle system was created for fish instances, with force fields applied (boids physics, vortex, attraction force and collision on the statue)

**Texturing/lighting**:

* Mix of concrete and coral on the statue
* Sand on the ground
* Nothing on the sea surface
* Radial opacity for ground and surface
* Voronoi textures baked as emission on the statue and the ground, to simulate the light deformation through water
* Lots of color processing

Christ of the Abyss

The 8.0-litre W16-cylinder engine with 1,850 PS and 1,850 Nm of torque is at its heart. Bugatti has designed the drive specifically for use on the race track, and has optimized it in particular for higher engine speeds. For a start, both intake and exhausts systems were de-throttled to obtain a more spontaneous response, while four newly developed turbochargers build up more boost pressure and power at higher engine speeds. In order to cope with the extremely high centrifugal forces the whole dry sump lubrication system was redesigned, bringing also weight saving benefits. The cooling system is new as well, from the air-to-air intercooling for the engine (instead of water-to-air), to the carbon-titanium turbofan radial compressors to ventilate and cool the high-performance racing brake system.

[https://www.bugatti.com/models/bolide/](http://)

Bugatti Bolide 2024

Yunnan Province, China, ~518 million years old.

*Myllokunmingia* had a head with a pair of eyes and a nasal opening, up to six pairs of **gills** housed in pouches on the lower surface of the head, and a **dorsal fin** supported by stiff radial rods. It also had **Z-shaped blocks of muscle** and would have been able to swim freely through the water by moving its body side-to-side like a fish.

Created for the First Animals exhibition at Oxford University Museum of Natural History: www.oum.ox.ac.uk/firstanimals

Model by Mighty Fossils: www.mightyfossils.com

Myllokunmingia fengjiaoa

Radial engine

This is pure computational topology. 
Not sculpted by hand, this model is the direct 3D output of the Polytopic Archetypal Projection Protocol (PAPP).
The Origin: The seed is the Shamseh, a radial star pattern from Islamic sacred geometry. 
Its 2D ratios were fed into an "algebraic transducer", mapped onto a 4D space using a Fibonacci lattice on an $S^3$ hypersphere, and projected into 3D via a Hopf fibration.
The Build (V5.1): Driven exclusively by the Golden Ratio ($\phi$) and Euclidean metrics, it generates hyper-dense, crystallized concentric shells—a "Cosmic Onion".
Network Science Data: Vertices: 163,892 deterministic nodes.
Clustering (C): 0.847 (pathologically high local density).
Path Length: 30.14.It acts like a "harmonic glass": locally perfect but lacking the small-world routing of our later builds.
Visual proof that coherent math collapses into brutal spatial elegance.

Shamseh V5.1 "Cosmic Onion"

This stone slab lies 3m to the NE of the kerb cairn on the Monzie estate. It measures 2.5m in length by 1.5m in breadth. The upper face has about 60 cups, each with up to 4 rings. The largest ring measures 400mm in diameter and the cups are up to 40mm deep. Two cups have radial grooves and one dumbell was also noted.

Visited in Febuary 2022. 

Check it out with matcap. It looks amazing.

Monzie, Crieff, Perthshire

Radial (AHAHAHAH)

El diseño combina arquitectura residencial con lenguaje sci-fi, destacando grandes superficies acristaladas, geometría radial y una silueta icónica que recuerda a platillos voladores. La base inferior actúa como soporte y acceso, integrando elementos urbanos y vegetación.

Casa Octogonal Moderna Elevada V2

Radial Ball Bearing Type 1000088

Detailed 3D model of the Boeing P-12, a classic American biplane fighter aircraft from the late 1920s and early 1930s. This model captures the iconic design of early military aviation with its radial engine, dual wings, and lightweight frame.

The asset includes two visual states, a weathered version showing rust and aging for realism, and a clean painted version with bright colors and markings. Ideal for historical scenes, games, simulations, and educational content focused on vintage aircraft and early aviation history.

Features include optimized geometry, game ready topology, and clean textures suitable for real time rendering. The model is perfect for use in game engines, VR projects, animations, and digital showcases.

Keywords: Boeing P-12, vintage aircraft, biplane fighter, military plane, low poly aircraft, historical airplane, WW2 era aircraft, radial engine plane, classic aviation, game asset 3D model

Low Poly Boeing P-12 Biplane

Atlantis V2 is a large-scale PAPP high-relief disc built as a Metatron Loka-style terraced ridge sculpture. 
The object encodes the concentric city of Poseidon through a dense radial architecture: 7 ring boundaries, 4 cardinal bridges, Poseidon’s trident, 12 family portal arches, the Protiktah/Chakana stepped cross, a central pyramid with twin obelisks, a caduceus-like double helix, 7 sacred rays, 24 orichalcum flame petals, 12 fortification towers, and 24 water-memory ripples. 
Generated from seed [169, 13, 12, 33], the mesh targets ~144,050 vertices and ~288,048 faces with Euler characteristic χ=2. 
The color system blends orichalcum gold, deep ocean blues, bronze, tin-grey, cyan, violet and ROYGBIV accents into a layered land/water city relief.

Generated by PAPP Framework.

Atlantis_V2 | PAPP

This object is a deterministic TPMS-derived microporous filter generated with the PAPP protocol. 
The internal architecture is based on a gyroid field and a balanced radial porosity profile, designed to combine high geometric complexity with continuous flow pathways.
The final validated mesh is watertight and manifold, with 0 boundary edges, 0 non-manifold edges, and 0 degenerate faces. 
Topology audit: genus 1571.
Balanced version metrics: body porosity 0.5999, porous-region porosity 0.6720, surface area 41.2607, 1,926,678 vertices, 3,859,636 faces.
This model sits between engineering filter design and computational geometry: a dense, highly interconnected porous solid suitable for visualization, topology study, and advanced fabrication-oriented workflows.

PAPP TPMS Filter — Gyroid

Cymatic Hyper Resonance (Ultra) is a math-generated cymatic sphere: a high-order spherical harmonic displacement mapped onto a radius-2.0 sphere and exported as a wireframe field (OBJ l primitives, not triangles). 

It is generated from the real part of 𝑌ₗᵐ with l=20, m=10, normalized and applied as a radial modulation with amplitude=0.6, producing dense standing-wave nodal structure (Chladni-like on a sphere). 

The geometry is sampled on a latitude/longitude grid (resolution=200 → 80,000 vertices) and connected as a continuous grid (159,800 line segments). 

Radius range: 1.4000 → 2.6000 (mean ≈ 2.0002). 

Vertex colors are embedded per-vertex as a procedural rainbow gradient along index (time). 

100% algorithmic / no hand modeling.

Cymatic Hyper Resonance — Ultra

A (21,13) torus knot — where 21 and 13 are consecutive Fibonacci numbers F(8) and F(7). 

The ratio p/q = 1.61538... approximates the golden ratio φ with Δ = 0.0026, making this a topological embedding of φ convergence.

Anatomy: 218,400 vertices, 420,000 faces, 638,400 edges. Built with exact Frenet-Serret frames (TNB orthogonality verified to 0.000000). 

The tube is a true polygon mesh, not wireframe — 8,400 core curve points × 24-sided cross-sections.

Color = Geometry: Vertex color encodes local curvature κ (warm = high bending) and torsion τ (violet shift at twist peaks). 

Brightness tracks radial position on the torus. 48,000 unique colors, zero cosmetic.

Inner Ribbon: A Seifert-inspired ribbon surface (16,800 faces) runs inside the tube, revealing the knot's twist structure and linking number = 273.

Topology: 21 full azimuthal turns, 26 meridional crossings. Single connected solid.

Generated via PAPP Framework.

Fibonacci (21,13) Hyper Knot V2 (218k) | PAPP

Sahasrāra, the Crown Chakra, reinterpreted as a high-relief PAPP disc. 

In tantric symbolism it is the thousand-petaled lotus of pure consciousness, beyond the elements and beyond ordinary sound. 

This object translates that idea into a dense terraced sculpture built from 1,000 micro-petals arranged in 20 staggered rings of 50, with a golden pericarp, luminous central bindu, moon region, triangle, radial spokes, and full-spectrum chromatic modulation.

Generated through a deterministic mathematical pipeline rather than manual sculpting, the piece uses ridge-based geometry, 14-step terracing, and embedded vertex color to create an object that feels both crystalline and radiant. 

Mesh: 114,530 vertices, 229,056 faces, closed manifold, χ = 2.

Generated by PAPP Framework

Chakra_07_Sahasrara | PAPP

This model was generated using Meshy, an AI-powered 3D creation toolkit. Meshy helps creators turn ideas into high-quality 3D models with ease. View the original model and claim a free month of Pro on Meshy: [https://www.meshy.ai/s/2nHzfo](https://www.meshy.ai/s/2nHzfo)

Radial Lattice Mandala

This 3D model represents a Deep Groove Ball Bearing, one of the most widely used rolling bearings in mechanical systems. The bearing consists of an inner race, outer race, and a series of balls that enable smooth rotational motion while reducing friction between moving components.

Deep groove ball bearings are commonly used in electric motors, gearboxes, automotive systems, and industrial machinery due to their ability to support both radial and axial loads.

Nut & Bolt

A high-relief geometric object built from a 19-circle Flower of Life structure and a 64-spoke polar framework, translated into a dense ancient-mosaic surface. This version uses deep grout channels, tessera-like microstructure, concentric ring modulation, and a 32-step terraced relief to create a sculptural object that feels both symbolic and archaeological.

The color language draws from ancient pigments — lapis, malachite, turquoise, cinnabar, ochre, purple, charcoal, ivory, and gold — combined with patina, grime, and gold abrasion to evoke the surface of a weathered ceremonial artifact.

This piece is not hand-sculpted: its form is generated through mathematical and procedural construction, using geometric rules, radial organization, and layered relief logic. Mesh: 61,058 vertices, 122,112 faces, closed manifold, χ = 2. 

Generated by PAPP Framework.

Flower of Life 19 - Ancient Relic | PAPP

A pure line-geometry lattice inspired by Khatam-style star tessellation, realized as a 3D “hyper-weave” inside a centered cubic volume. The model is not a surface mesh: it’s an edge network (OBJ l primitives) built from 10,206 vertices and 17,496 unique segments, forming a consistent strut system with uniform edge length √0.59 ≈ 0.7681146.
Node connectivity is tightly controlled (degree 3–4, with 5,832 nodes at degree 3 and 4,374 at degree 4), producing a stable, legible lattice rhythm rather than random graph noise. The structure spans [-10.8, +10.8] on X/Y/Z (cube extent 21.6) and is centered on the origin.
Per-vertex color encodes radial distance: the green channel is fixed (G = 0.8) while R + B = 1 everywhere, creating a clean red↔blue gradient that reads depth and density instantly in motion.

Khatam HyperLattice —10k Nodes |PAPP

This model is a deterministic TPMS-based porous filter generated with the PAPP protocol from a Schwarz P field and a balanced radial grading strategy. Compared with denser TPMS families, Schwarz P produces fewer, larger, and more direct flow channels, giving the structure a clearer cellular logic while preserving full topological closure.
The final validated mesh is watertight and manifold, with 0 boundary edges, 0 non-manifold edges, and 0 degenerate faces. 
Topology audit: genus 268.
Balanced version metrics: body porosity 0.5984, porous-region porosity 0.6701, surface area 33.2451, 1,565,940 vertices, 3,132,948 faces.
This piece is both a mathematical surface realization and an engineering-ready porous architecture, intended for studies of flow, filtration, topology, and fabrication-aware design.

PAPP TPMS Filter — Schwarz P

You can see it in action [here on Youtube](https://youtu.be/_FDZzKAFSz4),

and all the .stl files can be downloaded [here on the MakerWorld](https://makerworld.com/ru/models/1801690-balloon-powered-radial-engine#profileId-1921348). 

Can be powered by a balloon, or just by blowing air into it. Used in this [little toy car](https://skfb.ly/6LV6D).


![](https://i.imgur.com/JHsGiUt.jpg)
![](https://i.imgur.com/iaMC1VM.jpg)

Just a few of extra parts needed for the assembly:

* 3x nitrile glove fingers (blue part)
* 15x M3x8 bolts
* 2x M3x12 (or longer) bolts
* 17x M3 nuts

3d Printable Radial Pneumatic Engine

**Collection:** Prehistory and Historical Archeology Dept.

**Inv.-No.:** [UF-19446.2](https://www.online.landessammlungen-noe.at/objects/1278134)

**Material:** Clay

**Dimensions:** 17,5 x 8,38 cm

**Dating:** 2200-1601 BCE

The artefact consists of a mixture of hard-fired clay containing small amounts of quartz. The outer colour ranges from light brown to black, while the fracture has a brick-red to grey colour. It is composed of pieces of clay of varying sizes. The surface has been carelessly smoothed. The body has a flat to wavy structure, with the upper side having a contrasting and slightly curved texture. The perforation is slightly off-centre and is in a vertical position. Ten shallow, irregular impressions can be found radially around the perforation on the upper side of the artefact.

This object was digitized through the ‘Kulturerbe digital’ program of the Federal Ministry for Arts, Culture, Public Service and Sport.

The cylindrical roller or weight

Here's my quick attempt to recreate a panaeolus cyanescens mushroom (found in many cow pastures in Hawaii). They're also known as "blue meanies" because like all magic mushrooms they contain a dark blue substance (psilocybin) that runs throughout the entire mushroom and becomes visible on the surface when you pinch it.

This mushroom has a tan spot on the top of the cap, as shown, but I did have difficulty with the gills on the under side of the cap. I'm not sure if there's a better way to do it in sculptgl, but i just used crease and pinch for the radial lines, and then painted over it.

cheers,
    - PR

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