So.... A good concavity measure is just an unsolved problem in geometry?

The talk I presented at #SIGGRAPH2026 is now available on YouTube, for anyone who couldn’t attend or would like to revisit it :) youtu.be/OFJYBUArVPc?...

Dual Contouring of Signed Distance Data - SIGGRAPH 2026 [Technical paper presentation]

YouTube video by Xiana Carrera

youtu.be

Xiana Carrera@xianacarrera.bsky.social · 2mo ago

1/6 Excited to share our #SIGGRAPH2026 paper, Dual Contouring of Signed Distance Data! We propose a new method for reconstructing sharp meshes from discrete samples of signed distance functions (SDFs) that does not require gradients. Project page: gatc.cs.columbia.edu/projects/dua...

Have you dug deep into an evolving area of visual computing? Consider submitting to the 2027 EG STARs track! STARs are survey reports providing insight into the current state of the art and future directions. They're impactful and highly-cited! eg2027.isti.cnr.it/call-for-sta...

At #SIGGRAPH2026, I presented "points as tori" (PAT) for fast pointwise evaluation of signed distance for point clouds. Some code (Python w/ C++ extensions) and demo up: github.com/nzfeng/point... Contributions from people/LLMs welcome. Explainer thread below for the project: 🧵

Today at #siggraph2026, Disney Animation has four more talks! Here's a mini-thread about our four talks today, including three from the Hyperion rendering team about Disney Animation rendering tech: (1/10) disneyanimation.com/events/?draw...

Walt Disney Animation Studios - Events

The official site of Walt Disney Animation Studios.

disneyanimation.com

boy I’m sure glad we solved AI alignment before deploying modes that could autonomously jailbreak themselves and hack cloud provider infrastructure stuff could have gotten really weird

This is the weirdest timeline. The Jacobian Conjecture was possibly just proven to be false by a guy prompting an LLM and publishing a valid counterexample in a half-assed X post. Open problem since 1884/1939, one of the most known open problems in math. 🤯

Next week at #SIGGRAPH2026, we'll present "Fast Sparse Matrix Permutation for Mesh-Based Direct Solvers," with Behrooz Zarebavani, Ana Dodik, Changcheng Yuan, Serban Porumbescu, John Owens, Maryam Mehri Dehnavi, and @justinmsolomon.bsky.social . Talk: Wed., July 22, 3:55 PM, Room 403-B (1/6)

After some encouragement from various people I decided to make a GitHub repo for my ongoing Newton's Cradle benchmark of Google's Veo video model. All videos (spanning about a year) are available here for all your cradling needs: github.com/dilevin/newt...

When we presented GravoMG, a fast multigrid solver for surfaces, the first question we got was: can you make this work for tetrahedral meshes? Tomorrow, Marcel Padilla will present the answer at SMI in Istanbul. Sneak preview: yes, it's really fast. Code and paper: marcelpadilla.com/Projects/Gra...

Congratulations to Bernhard for his SIGGRAPH 2026 Paper 👍 PDF ge.in.tum.de/download/ST-... , Video youtu.be/-1Txagqj4N0 Our key idea: treat particles as samples in four-dimensional space-time. ST-FLIP acts as a temporal anti-aliasing mechanism for FLIP-style solvers.

I’m happy to announce the release of a new open source 3D physics engine called Box3D. I’ve been working on this project for a few years now, but it represents over 20 years of experience writing physics engines for games. Read more here: box2d.org/posts/2026/0...

Sheldon Andrews (profs.etsmtl.ca/sandrews/) is running for the ACM Executive Committee this year. I've known Sheldon for a long time and I think he will do a great job ! I voted for him, you should too www.acm.org/elections/si...

2026 ACM SIGGRAPH Election

Voting page for SIGGRAPH Elections

acm.org

I recently completed my PhD thesis, where I developed algorithms for making geometric inferences from imperfect data (i.e. incomplete and inaccurate observations/representations of shapes, like broken meshes or point clouds). A thread 🧵:

Giving a talk in the @Stanford SCIEN seminar this Wednesday (1/3) at 4:30pm: scien.stanford.edu/index.php/ev... The topic is “normal coordinates”: a shape representation little-used outside of mathematics—but which turns out to have nice applications in geometry processing & learning.

New paper by the incredible Donglai Xiang (xiangdonglai.github.io) at CVPR 2026 using RKPM inside a data free training framework to compute reduced elastic models. Trains faster, works better than competing Neural Network approaches. Check it out: research.nvidia.com/labs/sil/pro...

Got my daughter to eat a whole plate of veggies because she wants to become big enough to reach the next handle at the playground. She wants to swing like Spider-Man 😁

When dealing with noisy and/or partial inputs to describe a shape, the standard approach in geometry processing is to reconstruct a clean implicit surface first, and to do geometry on it. But why this one in particular? What about all the other surfaces that would have been coherent with the input?

We have a fun new paper to appear at SIGGRAPH 2026, led by Columbia PhD student Xiana Carrera, that extends dual contouring to work nicely with [pure] signed distance samples. It avoids classic DC's additional requirement of providing accurate Hermite / […] [Original post on mastodon.acm.org]

Plouf ! Our @eurographicsc.bsky.social course notes on Optimal Transport for Fluids, New and Old, with @pltc.bsky.social are out, here: diglib.eg.org/items/68a801...

Having a wonderful time at the Eurographics Conference in Aachen! I gave the longest talk of my life (3h) on the biggest screen of my life and I received the Eurographics PhD award for my thesis 🎉 A huge thanks to @eurographicsc.bsky.social and all my collaborators and supporters!

I've moved back to Norway with my family after resigning from my position at RWTH Aachen University. I've been on medical leave since Jan 2024, as a result of what likely is a variant of Long COVID. I hope to somehow eventually continue my research and wrap up the final project for my PhD. 1/4

Fun with semi-discrete Optimal Transport (getting ready for our course at Eurographics Conference next Monday and ACM SIGGRAPH in July with Cyprien Plateau-Holleville)

Today, I received this wonderful porcelain figurine as a gift from one of my students, Ziheng Liu (libero0809.github.io), who defended his PhD last week.

Preparing for our course "Optimal Transport Based fluid simulation: New and Old" with Cyprien Plateau-Holleville (EUROGRAPHICS and SIGGRAPH) 2D simulation of "droplet hurdles race" (De Maleprade et.al). Features high surface tension, viscosity and fluid boundary - domain interactions.

I can't help but wonder if these people really are that stupid or if they are just willing to say absolutely anything regardless of what is true or false. It would be funny if it wasn't so depressing...

Aaron Rupar@atrupar.com · 4mo ago

RFK Jr: "President Trump has a different way of calculating percentages. If you have a $600 drug and you reduce it to $10, that's a 600% reduction."

If, like me, you wake up every morning wondering what the Voronoï diagram of arbitrary shapes looks like, here is the answer:

My erosion filter is out! Video, blog post, and shader source. It emulates erosion without simulation, so it's fast, GPU friendly, and trivial to generate in chunks. Explainer video: www.youtube.com/watch?v=r4V2... Companion blog post: blog.runevision.com/2026/03/fast... #ProcGen #vfx #GameDev

About 6 months ago, I publicly announced that I would be boycotting #SIGGRAPHAsia 2026. Today, I released a video explaining my rationale and calling on others to do the same, because I believe it is important. Here it is: youtu.be/bZ6s0-EQp8M

Why Boycott SIGGRAPH Asia 2026?

YouTube video by Cem Yuksel

youtu.be

Cem Yuksel@cemyuksel.com · 11mo ago

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!