pltc

About fast 2D CDF construction In a path tracer, sampling a light source that is driven by a texture, such as a HDR map, requires mapping a 2d random number to texels of the map, with a probability that is proportional to the br…

Cool. I posted a while ago about fast CDF reconstruction. I wonder if you are doing something like this or have a different technique. maxliani.wordpress.com/2024/03/09/a...

Ever seen one of these, and wondered *why* they work? 🧵

This is a so-called Bitonic sorting network, and the illustrations show the two common ways to implement them. From an implementation point of view the two methods are effectively the same, so which one you pick just comes down to preference.

Nanite Tessellation Nanite Tessellation, aka Nanite Dynamic Tessellation, aka Nanite Dynamic Displacement was the next major feature I worked on after Nanite it...

I'm finally writing up how Nanite Tessellation works. The first few blogs posts are up. More will be coming.
graphicrants.blogspot.com/2026/02/nani...

New post on how to do real-time diffuse global illumination using surfels and #WebGPU: juretriglav.si/surfel-based... #threejs

Original: an old photo I took in the forest

3D voxelized scene in the day.

3D voxelized scene in the night.

3D voxelized scene in the day with volumetric fog.

This was a fun quick experiment:
Using an old photo I took in the forest, I used ml-sharp to generate gaussian splats from it, voxelized it in my toy renderer, relit the scene dramatically.
#rendeting #metalrt

2D Voronoi meshing of a multi-component wing (image from the Nasa-Ames research paper)

3D Voronoi meshing around a reactor (image from the Nasa-Ames research paper)

3D Voronoi meshing around a wing + reactor (image from the Nasa-Ames research paper)

3D Voronoi meshing around a wing + very accurate modeling of ice formation (image from the Nasa-Ames research paper)

Geogram flies !

The other day, I was reading this article from NASA Ames Research Center:

ntrs.nasa.gov/api/citation...

What do they use for the geometric computations ?
Geogram of course ! (thrilled !!)

Geogram is a library with geometry processing algorithm:
github.com/BrunoLevy/ge...

Gaboronoi (top) vs Anisotropic Voronoi (bottom)

Gaboronoi (top) vs Anisotropic Voronoi (bottom), with 5000 Sites. I feel like the anisotropic voronoi's artifacts are more aesthetically pleasing. Gaboronoi is faster to train by a lot!

I've compiled all of my recent voronoi experiments into a collab:
colab.research.google.com/github/jaker...

My "How to Vulkan in 2026" @vulkan.org #Vulkan guide is now publicly available at www.howtovulkan.com

I still consider it a preview, though I'm mostly happy with it and only plan on changing minor things and incorporating some feedback.

No Graphics API — Sebastian Aaltonen Graphics APIs and shader languages have significantly increased in complexity over the past decade. It’s time to start discussing how to strip down the abstractions to simplify development, improve pe...

My "No Graphics API" blog post is live! Please repost :)
www.sebastianaaltonen.com/blog/no-grap...

I spend 1.5 years doing this. Full rewrite last summer and another partial rewrite last month. As Hemingway said: "First draft of everything is always shit".

Posting an older article on "Probability Theory for Physically Based Rendering", using tomorrow's #thisisigad Graphics Guild lecture as an excuse:
jacco.ompf2.com/2019/12/11/p...
There is also a part 2.

A modernized Utah Teapot model with interior! You can see/customize/download it, along with historical versions on the official teapot page:
graphics.cs.utah.edu/teapot/

New blog post on how to render beautiful soft shadows projected by the user's finger with Jetpack Compose.

www.romainguy.dev/posts/2025/f...

Mapping the future with 3D-printed titanium Apple Watch cases Apple Watch Ultra 3 and titanium Apple Watch Series 11 cases are now 3D-printed with 100 percent recycled aerospace-grade titanium powder.

So Apple put out an article this week about how they are now 3D printing titanium parts in large volumes for Apple Watches and iPhone Air; this is a bit of a surprise and really cool!

(1/3)

www.apple.com/newsroom/202...

The Graphics Replicability Stamp Initiative (GRSI, www.replicabilitystamp.org), a community-driven initiative to promote replicability in Graphics research, is seeking volunteers.

More details in the 'Volunteering' section of the home page.

A rather strange twisted-looking smooth shape generated as the volume of space swept out by a rotating and translating sculpture. The left shows an opaque rendering, the middle shows the same shape with surface points colored to indicate the time, and the right shows a semi-transparent view.

There's a new and very neat-looking SIGGRAPH Asia paper on constructing the swept volume based on the path of a moving (possibly deforming) object. Check it out!

https://jurwen.github.io/Swept-Volume-Page/

YouTube video by Lucas Doing Surface Imperfections Right | Vray, Cycles, Arnold..

Here's a great video explaining/showing why the common CG practice of plugging smudge/fingerprints/dirt/whatever maps into roughness is wrong and why it should be done using material layering instead. This video is really well-made!

www.youtube.com/watch?v=OW4L...

apparently there are also native sdf nodes in blender 5 now

i wrote an efficient convolution reverb for dreams while at mm years ago, and found myself in need of one again. my memory was hazy on the details, and i couldnt find it written out in a simple way i could immediately understand, so i chewed a pencil and reminded myself. heres how i think about it

New blog post! In "Billions of triangles in minutes" we'll walk through hierarchical cluster level of detail generation of, well, billions of triangles in minutes. Reposts welcome!

zeux.io/2025/09/30/b...

Graphite's interactive "CosmoViewer". Explore your cosmologic simulations interactively !

Couple pieces about this work -

about the sphere packing, using voxel "dart throwing" on the GPU:
jbaker.graphics/writings/sph...

about the reuse of the data structure from the sphere packing, reinterpreting it as a grid-based raytracing acceleration structure:
jbaker.graphics/writings/dda...

Super proud to have been part of this work led by Sam Bourgault and Alejandro Aponte @ expressive computation lab

With WORM, we propose a new way to program cobot manufacturing actions through skilled manipulation and procedural repetitions

Checkout the paper and demo at #UIST2025

semi-discrete optimal transport: galaxy clusters and Laguerre diagrams.

Large-scale semi-discrete optimal transport with distributed Voronoi diagrams,
Final version available here:
www.sciencedirect.com/science/arti...

Is #geogram's Constrained Delaunay Triangulation robust ?
... on the testbench !
github.com/BrunoLevy/ge...

Cyprien Plateau--Holleville in front of his title slide at the RING meeting

RING meeting in Nancy,
Cyprien Plateau--Holleville presented presented his awesome work on exact integration of the differential quantities involved in Partial Optimal Transport. And that's not all: It comes with a combined physsim - Optimal Transport - rendering on the GPU !

A cosmological simulation, showing the cosmic web, with 300 million galaxy clusters. A nice test case for the new algorithm !

Our article "Large-scale semi-discrete optimal transport with distributed Voronoi diagrams" (with Nicolas Ray, Quentin Merigot and Hugo Leclerc) just got accepted by Journal of Computational Physics. Pushing the limits of Optimal Transport by several orders of magnitude !

Detecting reads from uninitialised heap memory in C++ programs at runtime www.forwardscattering.org/post/71

New short post:
"Thinking about convolutions for graphics"
aschrein.github.io/jekyll/updat...

Anyone here have experience PyPI packaging of custom nanobind bindings for CUDA code specifically? I'm fairly good at pybind/nanobind for standard C++ stuff, but I don't even know where to start for GPU code, especially one that links to Nvidia's proprietary libraries.

pls halp 🙏🙏🙏