This is a photogrammetric reconstruction of an operating room of the Charité University Hospital in Berlin.

Please also check out this model on our [Digital Surgery Sketchfab Account](https://skfb.ly/oIyEP)

**If you use this model in your project, please cite our publication:** https://pubmed.ncbi.nlm.nih.gov/35137646/

Use this textblock for the citation:

*Queisner M, Pogorzhelskiy M, Remde C, Pratschke J, Sauer IM. VolumetricOR: A New Approach to Simulate Surgical Interventions in Virtual Reality for Training and Education. Surg Innov. 2022 Jun;29(3):406-415. doi: 10.1177/15533506211054240. Epub 2022 Feb 9. PMID: 35137646; PMCID: PMC9438748.*

More about our research: http://experimental-surgery.de/digitalsurgery/

The paper explores the concept of letting surgical stuff train in a virtual operating setting.
This is one of several general ORs in the Charité Campus Mitte (CCM), scanned in 2018. Shot with Nikon D3400 (500 images), reconstructed in Metashape, refined in Blender.

Charité University Hospital - Operating Room

Testing out some fake volumetric based on C++ generated noise images...

This does not look really impressive so far, but the technique seems to work fine and I guess that further experiments could only make for some future nicer models !

Note that using transparency planes (3 x 225 in this case!) is quite resource-intensive, and the model might only work fine on desktop.

Fluffy Cloud

Given the recent scientific news and the fact that I'm on the "experimenting with volumetrics" path, I figured out that trying to reproduce space objects with simple force-driven particle simulation could be a fun exercise. Here are some first tests !

This object was made by moving 1000 particles around (rigid body rotation initial speed, one central repulsive force and two attractive ones), and "registering" their paths in an alpha voxels grid (225x225x225), which I finally mapped to textured planes for the volumetric effect.

A final central sphere was used with refraction parameters to create the center "black hole".

Might be resource intensive, sorry for that !

Not a Black Hole - 1

A 3D model inspired by the The Vast Land / [A Thousand Li of Rivers and Mountains](https://en.wikipedia.org/wiki/Wang_Ximeng),  by Wang ximeng, a painter of the Norther Song dynasnty, China. Painted in 1113, Wang Ximeng was only 18 years old when he painted the master piece. To the disappointment of everyone, including the artist Emperor Huizong, who personally taught him, Wang Ximeng died shortly after, depriving us of any further masterpieces. The painting is now in Palace Musuem Beijin, and was influiential for many generations to come!

Made in Houdini and textured in Blender. 

![](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Wang_Ximeng_-_A_Thousand_Li_of_River1.jpg/2560px-Wang_Ximeng_-_A_Thousand_Li_of_River1.jpg)

The model was used for a real time volumetric fog, which you can read more about [here](https://shahriyarshahrabi.medium.com/interactive-volumetric-fog-with-fluid-dynamics-and-arbitrary-boundaries-f82fdee86397).
![](https://miro.medium.com/max/2285/1*7o51IgzxWMkwunOE8YDdDw.jpeg)

The Vast Land

# A simple gothic window with painted glass. 
There is a lot that can be done to the window, but I think this is a good starting point.  

See this previews of a real volumetric rendering in Blender with this window (*no composting fake*). 
![Colored Gothic Window with Blender 01](https://abload.de/img/room_018ucyo.png)
![Colored Gothic Window with Blender 02](https://abload.de/img/room_02u6c8b.png)
This example scene is created with Blender (scene is not included!).

Take a look at this new gothic window:
https://sketchfab.com/3d-models/big-gothic-window-with-stainedpainted-glass-d5ddfcbdb30b4af585e81ed0cbe05589

Feel free to check out my other free models. Please support my work and sponsor me a coffee (*black, no sugar*) or give me a like or a comment.

Gothic window with painted glass

sun shining afternoon volumetric lights brutalist scene 
3DScene
ArchitecturalVisualization
InteriorDesign
3DModeling
CGI
RealtimeRendering
#GlobalIllumination 
Real time ray tracing model
Ray traced baked
path tracing

VR Room [Light Baked]

Repositorio de modelos 3D de Ddiaz Design

![](https://images.hgmsites.net/lrg/1966-chevrolet-chevelle-by-ring-brothers-2014-sema-show_100489549_l.jpg)

Durante el pasado SEMA Show 2014, celebrado en Las Vegas, Ringbrothers (web) presentó su último proyecto, un Chevrolet Chevelle de 1966 con un motor LS7 V8 con un compresor volumétrico con el que consigue rendir una potencia de 980 CV, aunque en su lateral se puede ver una placa en la que indica 1KHP (1 King HorsePower) haciendo relación a los 1.000 CV.

Instagram del proyecto: https://www.instagram.com/ddiaz.design/

Paypal Donations: https://paypal.me/sergiodd

Based on a CSR2 3d model

Credits: https://www.facebook.com/p/GM25-100042237200164/

Ringbrothers 1966 Chevrolet Chevelle Recoil

Realistic Alaskan Grizzly Bear - Roaring & Standing - UE5

Unleash the power of the wild with this hyper-realistic Alaskan Grizzly Bear.
Captured in a dramatic standing roar, this asset is designed for high-end cinematics, wildlife simulations, or as a centerpiece "hero" asset in Unreal Engine 5.

Key Features:
Hyper-Realistic Detail: Features individual strand-level fur textures and macro-detail on claws, teeth, and nose.
Cinematic Quality: Rendered with dramatic backlighting and volumetric considerations in mind.
Versatile Use: Perfect for nature documentaries, horror games, or survival simulators.

Realistic Alaskan Grizzly Bear - R3.0

Realistic Alaskan Grizzly Bear - Roaring & Standing 

Unleash the power of the wild with this hyper-realistic Alaskan Grizzly Bear.
Captured in a dramatic standing roar, this asset is designed for high-end cinematics, wildlife simulations, or as a centerpiece "hero" asset in Unreal Engine 5.

Key Features:
Hyper-Realistic Detail: Features individual strand-level fur textures and macro-detail on claws, teeth, and nose.
Cinematic Quality: Rendered with dramatic backlighting and volumetric considerations in mind.
Versatile Use: Perfect for nature documentaries, horror games, or survival simulators.

Realistic Alaskan Grizzly Bear -M2.5

Magic Staff

This is a one-stroke cross-shaped knot domain transformed into a closed tubular mesh with woven crossings and verified topology. 
Generated, not hand-modeled: the Celtic Cross starts as a gate-constrained one-stroke path on a 30-grid cross domain, then becomes a Catmull–Rom ribbon and a 10-sided tube via parallel-transport framing and z-lift weaving. 
Its unique mechanism is a ring inscribed into four arms, with knotwork continuously filling both the circle and the axial cross
The generator builds it as a circular ring inscribed in a four-arm cross, then fills both the ring and the arms with continuous knotwork so the form reads as one braided spatial system. 
In 3D, the Celtic Cross gains a strong ceremonial mass: the central ring stabilizes the object while the four arms extend as balanced directional axes, giving the piece the presence of a carved ritual sign translated into full volumetric topology.

Generated by PAPP Framework.

04_celtic_cross

For production-ready use, we recommend downloading the original file.The converted file is intended only for use in the web viewer. In the original file, the following are fully preserved:✔ original scene hierarchy✔ complete materials without reduction✔ accurate texture maps✔ original object namesIf you plan to use this model in production, choose the Original format.Procedural volumetric cloud generator.

Procedural Clouds

Major Chord Flux Tube translates the consonant 4:5:6 major triad into a volumetric geometric flow. 

Instead of drawing harmony as a simple curve, the structure is built as a dense multi-strand cable: a woven flux tube that twists around an underlying harmonic path. 

The result feels both mathematical and musical — a visible form of resonance, stability, and tonal brightness. 

With its braided line architecture and continuous looping motion, the object reads like a spatial chord: tension distributed evenly, rhythm embedded in repetition, and harmony crystallized into structure.

Generated by PAPP Framework

Major Chord Flux Tube | PAPP

**Quintic Fermat CY3 Flux** is a computational 3D visualization of the classical Fermat quintic Calabi–Yau threefold, one of the most iconic spaces in string theory compactification. 
The original object is defined by the equation (x₀⁵ + x₁⁵ + x₂⁵ + x₃⁵ + x₄⁵ = 0) in complex projective space (CP⁴), with Hodge numbers (h^{1,1}=1) and (h^{2,1}=101). 
In this interpretation, the higher-dimensional manifold is translated into a readable 3D flux structure through the PAPP methodology, using multi-strand volumetric tubes to suggest internal resonance, connectivity, and curvature. Rather than claiming to be the literal manifold itself, this object acts as a geometric artifact inspired by the quintic’s role in mirror symmetry, enumerative geometry, and 10D→4D compactification physics. 

Generated by PAPP Framework

Quintic Fermat CY3 Flux | PAPP

Sunflower Phyllotaxis Ultra is a biomorphic “flux geometry” built from Vogel’s phyllotaxis model (optimal seed packing). 

Seed centers follow the golden-angle spiral: θ = n·137.508° (= 360°/φ²) and r = c√n, then lifted onto a 3D parabolic bowl z = 0.015 r². 

Each of the 1,200 seeds is connected to its 6 nearest neighbors (KDTree), but connections are not simple lines: every link is a volumetric Flux Tube composed of 6 twisted strands (twist rate 8) to create cable-like density. 

Fibonacci spiral families become visible (21/34/55 …) as emergent structure. 

This is a line-based OBJ (l primitives) with embedded vertex colors (emerald→cyan→gold index gradient), generated entirely by mathematics—no hand modeling. But i played with the hue for effect on this site.

Stats: 526,050 vertices / 505,008 edges, file ~31.5 MB.

Generated by PAPP Framework

Sunflower_Phyllotaxis_Ultra | PAPP

This piece is a one-stroke symbolic knot converted into a watertight tube mesh, where a continuous path is lifted into 3D and woven with explicit crossing logic. 
Generated, not hand-modeled: the Ankh starts as a gate-constrained one-stroke path on a 30-grid symbolic domain, then becomes a Catmull–Rom ribbon and a 10-sided tube via parallel-transport framing and z-lift weaving. Its uniqueness is the phi-ratio crossbar fused to an oval loop and vertical stem in one continuous watertight band.
The Ankh domain combines an oval loop, a vertical stem, and a phi-ratio crossbar into a single spatial structure, keeping the ancient Egyptian silhouette readable while giving it the thickness and continuity of knotwork. 
The result feels halfway between emblem, pendant, and ceremonial object: an Egyptian cross of life rebuilt as a braided volumetric form instead of a flat sign.

Generated by PAPP Framework.

Ankh OSG | PAPP

**Kummer Surface K3 Flux** is a computational 3D visualization inspired by the Kummer surface, a classical K3 example obtained by resolving the quotient (T⁴/(±1)). 
In mathematics, the Kummer construction is known for its singular quotient structure and its 16 exceptional curves introduced through resolution. 
This object translates that logic into a PAPP flux geometry: a woven network of volumetric strands that suggests concentration, branching, and reconstructed continuity. 
Rather than serving as a literal algebraic model, the piece acts as a geometric interpretation of the Kummer idea—where singularity, symmetry, and smooth resolution meet inside a single topological-looking 3D artifact. 
It sits between mathematical visualization, abstract structure, and computational sculpture. 

Generated by PAPP Framework.

Kummer Surface K3 Flux | PAPP

volumetric cloud converted to geometry to be able to distribute cluster card of additive clouds

Cloud

**Torus Fiber Elliptic CY Flux** is a 3D computational visualization of an elliptically fibered Calabi–Yau structure, where a torus (T²) is fibered over a lower-dimensional base. 
Elliptic fibrations are central in F-theory and in many geometric compactification models, where singular or degenerate fibers encode physical information such as gauge symmetries. 
This object reinterprets that architecture through the PAPP flux language: bundled volumetric strands, projected topological flow, and readable 3D connectivity. 
Instead of presenting the manifold as a conventional static mesh, the form emphasizes fibering, resonance, and structure-through-connection. The result is a geometric sculpture that points toward the logic of elliptic Calabi–Yau spaces while remaining a computationally generated artifact in its own right. 

Generated by PAPP Framework.

Torus Fiber Elliptic CY Flux | PAPP

Flower of Life Flux Complexity is a computational 3D wire-structure built as a dense spatial lattice inspired by Flower of Life logic and translated into a volumetric flux graph. 
Rather than a closed surface mesh, the object is a single connected network composed of 863 vertices and 4,452 structural line segments distributed across a symmetric 12 × 12 × 12 spatial field. 
All connections are uniform in length, giving the piece a highly regular internal rhythm despite its visual complexity. 
The result reads as a sacred-geometric complexity field: part lattice, part energetic scaffold, part mathematical diagram extruded into space. Instead of representing a single solid body, this object reveals structure through connectivity, repetition, and spatial resonance, turning Flower of Life pattern logic into a coherent 3D computational artifact.

Generated by PAPP Framework.

Flower of Life - Flux Complexity | PAPP

These are some ice cubes I created. Below are the components of what makes a cube of ice:
– The displacement is based on the difference between F2 and F1 voronoi, fractalized (scale is repeatedly multiplied by constant "n", texture is also repeatedly divided by n, all passes are added together)
– The normal map is just Improved Perlin Noise (16 octaves)
Materials:
– Glass (Transmissive)
    – Refraction (IOR = 1.330)
    – Glossy
    –Mix based on fresnel reflectance (i_0 + (1-i_0)(1-cos(incoming angle))^5)
– Volumetric
    – Very little absorption
    – A little more but still little scattering
These models can be used, as long as ***credit is given***

Ice Cubes

testing-volumetric

View the NASA InSight Lander in true 3D Augmented Reality with the Aryzon AR Headsets for educational purposes! (www.aryzon.com)

Source & full credits of 3D model: https://nasa3d.arc.nasa.gov/detail/insight_cruise_lander
Disclaimer: I only uploaded this model with the correct files to view via the gLTF format in true volumetric 3D Augmented Reality to explore the InSight Lander!

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