#geogram 1.9.7 is out ! Geogram is a software library of geometric algorithms, it has mesh intersection, remeshing, CSG, Delaunay and Voronoi in 2D and 3D, constrained Delaunay triangulation in 2D ... and much more ! github.com/BrunoLevy/ge...

The #SIGGRAPH Thesis Fast Forward 2026 submissions are now open! Deadline: Nov 7th 2025. Let the world know what you've been working on in your PhD! More info at research.siggraph.org/thesisff/ and check out last year's iteration youtube.com/watch?v=8esF...

Musicians, are there better options for Chords & Lyrics than Ultimate Guitar Tabs and Songsterr? They both suck, but I can't seem to find something actually good.

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

Jolt Physics v5.4.0 is out! Check out the release notes here: github.com/jrouwe/JoltP...

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...

Nicely produced clip by Matt Wein and Marylee Williams about our recent dice design project at @scsatcmu.bsky.social and @adobe.com youtube.com/shorts/jD0ag... 🎲 🎥 🐉 🪙

I don't like calling people dumb, but I will make an exception because this man's actions affect us all. I honestly can't think of a dumber individual. Of all the people I've ever seen, Trump might just be consistently the dumbest. And that's the president! Still baffled, all these years later.

The "AI for Social Good" narrative is a tactic to consolidate power in the hands of those with no commitment to social good. The tech does not do what it is claimed to do and what it is claimed to do exacerbates root problems. Uncritical technosolutionism is a denial of service attack on humanity.

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 !

I got tired of mashing together tools to write long threads with 𝐫𝐢𝐜𝐡 𝑓𝑜𝑟𝑚𝑎𝑡𝑡𝑖𝑛𝑔 and ℳα†ℏ—so I wrote La𝑇𝑤𝑒𝑒𝑡! It converts Markdown and LaTeX to Unicode that can be used in “tweets”, and automatically splits long threads. Try it out! keenancrane.github.io/LaTweet/

I am boycotting #SIGGRAPHAsia 2026 because it will be in Malaysia, where there are serious safety concerns for the LGBTQ+ members of our community, thereby excluding them. I will not attend, submit my work to, or perform any reviews for SIGGRAPH Asia 2026. Yet, I'm excited about #SIGGRAPHAsia 2025!

🚀 Europe’s first exascale supercomputer is here! JUPITER, launched in Germany, is the EU’s most powerful system and fourth fastest worldwide. 100% powered by renewables, it has also ranked first in energy efficiency. It will boost AI, science, and climate research. Read more - europa.eu/!vcWBqW

Below is my response to being invited to serve on the technical papers committee at SIGGRAPH Asia 2026 (in Malaysia) TLDR It's a no.

We just wrapped up the 5th Summer Geometry Initiative (SGI), bringing 30 Fellows to our cohort of 150+ alumni, who go on to PhD/MS programs, industry jobs, and more. Despite overwhelming success, SGI26 is uncertain thanks to the changing funding landscape. Please help by helping identify sponsors!

Some sparse matrices are so pathological & break direct solvers, preconditioners, and iterative methods on GPUs. Here I explore these “nightmare matrices” and show how deflation and block methods can reshape the problem into one GPUs actually like to run. www.reidatcheson.com/sparse%20lin...

"It is beautiful. It is elegant. Does it work well in practice? Not really. This is often the caveat we face in research: the things that are beautiful don't work and the things that work are not beautiful." – Daniel Cremers

So in Germany apparently the movie "Taken" is called "96 hours". They translated the English title into ... another English title? Make it make sense!

Our fast forward for SIGGRAPH 2025. Keep SIGGRAPH weird! www.youtube.com/watch?v=sYel...

I could not be more disappointed in the management of SIGGRAPH for this, the most spineless of PR blog posts. Count me as someone who will not have their name on any submission to SIGAsia 2026. If enough of us withhold the content they sorely need, maybe next time they will engage more earnestly.

After 6+ mos of discussion and an open letter with 600+ signatures, SIGGRAPH leadership finally responded with...a short blog post? It only obliquely *acknowledges* the issue and doesn't articulate concrete change. What are the "nuances and complexities"? Insulting. www.siggraph.org/news/listeni...

Today's discourse on "LLMs can't be doing anything, they're just matrix multiplies" could benefit from a read of "More is Different" www.tkm.kit.edu/downloads/TK...

I don't have access to GPT-5, but I can never reproduce these. o3 seems to get it right every time, even with made up words (I'm sure it'll get it wrong eventually but I'm out of patience)

How can one reconstruct the complete 3D interior of a wood block using only photos of its surfaces? 🪵 At SIGGRAPH'25 (Thursday!), Maria Larsson will present *Mokume*: a dataset of 190 diverse wood samples and a pipeline that solves this inverse texturing challenge. 🧵👇

Me,Peter Chen and Eitan Grinspun are hosting a SIGGRAPH workshop on reduced-order models. Great keynotes from Maurizio Chiaramonte (Meta), Jernej Barbic (USC) and Mengyu Chu (Peking University) plus a bunch of awesome lightning talks. Come check it out: roms.news

We've seen how to define and apply Monte Carlo integration, but there's a whole world of techniques for reducing variance. Part five (thenumb.at/QMC) covers Quasi-Monte Carlo: negative correlation, stratified and adaptive sampling, and low-discrepancy sequences.

AI/ML research in medicine often uses a large amounts of variables but relatively few patients in comparison. I can't help but think that whatever they find might just be coincidental. In a high dim space you can easily fit a wide range of observations. This paper seems to confirm this notion

Unsure what to think of the recent news of AI models reaching Gold at the International Math Olympiad. Very impressive, of course, but I'm troubled by the rapid progress. Up to now I've seen AI as unable to solve novel problems and mostly as a productivity aid. But this is something else...

At SIGGRAPH 2025, Intel, Disney, & Chaos are doing a course on the nitty gritty details of implementing path guiding methods in 3 production renderers: Cycles, Hyperion, and Corona. I helped write the course notes: 80 pages of great stuff! Coming soon. s2025.conference-schedule.org/presentation...

Mesh intersections is hard ! Three years of agonizing pain summarized in my article that just got accepted to ACM Transactions on Graphics dl.acm.org/doi/10.1145/... The implementation and the expansion-based arithmetic kernel are available in geogram: github.com/BrunoLevy/ge...

I am very worried about what the absolutely enormous ICE budget will be used for. Dark days ahead for democracy in the world

Logarithmic maps are incredibly useful for algorithms on surfaces--they're local 2D coordinates centered at a given source. Yousuf Soliman and I found a better way to compute log maps w/ fast short-time heat flow in "The Affine Heat Method" presented @ SGP2025 today! 🧵

Quick “teaser” for a fun #SIGGRAPH2025 project, led by Hossein Baktash, on optimizing a shape to have the desired rolling statistics. Basically we can turn arbitrary objects into fair dice, or make dice which capture the statistics of other objects—like several coin flips.

G is for Geometry, G is for Geogram ! New version v1.9.6 of Geogram, the award winning geometry processing library. Press G for Geogram, and play with advanced geometry processing tools. github.com/BrunoLevy/ge...

Speaking of SIGGRAPH, as usual I'm assembling a list of the physics animation-y subset of the technical papers, with links: https://www.physicsbasedanimation.com/2025/05/19/siggraph-north-america-2025/

Holding SIGGRAPH Asia 2026 in Malaysia is a slap in the face to the rights of LGBTQ+ people. Especially now, when underrepresented people need as much support as we can possibly give them ! Angry like me ? Sign this open letter to let them know. 🏳️‍⚧️🏳️‍🌈 docs.google.com/document/d/1...

Our #SGP25 work studies a simple and effective way to uniformly sample implicit surfaces by casting rays. (1/9) “Uniform Sampling of Surfaces by Casting Rays” w/ @abhishekmadan.bsky.social @nmwsharp.bsky.social and Alec Jacobson

Rendering nerds! Check out our latest work "Vector-Valued Monte Carlo Integration Using Ratio Control Variates" that has just gotten the best paper award at SIGGRAPH 2025. This paper presents a method that reduces variance of a wide range of rendering and diff. rendering tasks with negligible cost.

If you're interested in #ScientificComputing and/or #RustLang, you should come to #SciCompInRust25 next week. It's taking place virtually and is free to attend. Timetable at scientificcomputing.rs/2025/timetable. Register at scientificcomputing.rs/2025/register.

The schedule for SIGGRAPH North America 2025 is up! https://s2025.conference-schedule.org/ I'm slowly gathering a list of links to the physics-animation-related technical papers here: https://www.physicsbasedanimation.com/2025/05/19/siggraph-north-america-2025/

I stand (sit) behind this: alecjacobson.com/weblog/siggr... I will also warn Israeli potential attendants (meaning any civilian connection to Israel, like familial relations, loose as it may be) risk *getting kidnapped or worse*. Yes, even if you travel with a foreign passport, you may be targeted,

Check out DiffLocks, appearing at #CVPR2025. From a single image, we estimate about 100K hair strands that you can then physically simulate. We use a dataset of 40K synthetic hair images with ground truth strands. It's all available for research purposes.

Siste del av Nina Steinkopfs serie om brukermedvirkning for ME-pasienter. Tar for seg behandlingen i det norske systemet. Serien i sin helhet er svært godt begrunnet med kilder. Det er til tider hårreisende lesning. Norge har sviktet ME-pasientene.

An update, a bit of retrospection, and a call for you, yes, you, to help JCGT a bit: www.realtimerendering.com/blog/jcgt-is...

Our computational framework for Inverse Geometric Locomotion finds suitable deformations of an elastic disk so that it swims forward in a dissipative medium. By modulating stiffness, we can recover the styles of locomotion observed, from example, in stingrays.

Here is something new: Inverse Geometric Locomotion is our latest paper to be published at ACM SIGGRAPH. Led by Quentin Becker and Oliver Gross, this project studies how we can find deformations of a shape such that these body changes lead to a desired motion. Fun stuff! More info: go.epfl.ch/igl

new blog post: "Gradients are the new intervals" www.mattkeeter.com/blog/2025-05... If you've got Lipschitz-continuous distance fields, you can use single-point samples to do tricks that normally require interval arithmetic – like hierarchical evaluation and expression simplification!

Trump accepting a 400 million dollar bribe and referring to the democrats as corrupt in the same statement is peak irony. It would have been funny had it not been so sad