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Reposted by Axel Paris

Baptiste GENEST @baptiste-genest.bsky.social · 8d

Computing the exact bijection of the optimal transport (OT) problem between very large point sets is completely untractable…

In our SIGGRAPH Asia 2025 paper: “BSP-OT: Sparse transport plans between discrete measures in log-linear time” we get one with typically 1% of error in a few seconds on CPU!

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Mathieu M.J.E. Rebeaud @chercheurjuteux.com · 9d

OpenAI's new Sora video generator to require copyright holders to opt out, WSJ reports

Putain de parasites de merde. J'en ai marre, c'est pas à toi de devoir te retirer de leur merde, c'est à eux d'avoir les droits putain.

www.reuters.com/technology/o...

OpenAI's new Sora video generator to require copyright holders to opt out, WSJ reports

OpenAI is planning to release a new version of its Sora video generator that creates videos featuring copyrighted material, unless copyright holders opt out of having their work appear, the Wall Street Journal reported on Monday, citing people familiar with the matter.

www.reuters.com

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François Malaussena (@malopedia) @malauss.bsky.social · 14d

Les 1,8 millions de signatures de la pétition de Philippe de Villiers contre l'immigration sont complètement bidons, et je peux le prouver.

Mais il y a plus intéressant, ce qu'il y a derrière, à savoir une opération de l'empire Bolloré. Un thread 🧵⤵️ https://t.co/hHF2dUqi8Z

Un graphique affichant avec une courbe bleue l'évolution, à chaque minute, du nombre de signatures affiché sur le site, sur une période de nuit.

Une seconde courbe rouge est derrière, quasi identique, à un détail près : 4 pics de 50 signatures, qui correspondent aux moments où j'ai simulé des signatures. C'est ce qui aurait dû apparaître si le compteur n'était pas truqué.

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Padre Pio @padrepio.bsky.social · 17d

Eh ben celle-là, en termes de tartufferie, elle vient de faire péter le plafond de la Sixtine.

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Sumitra Badrinathan @sumitra.bsky.social · 19d

i don’t think people on bluesky understand the severity of this situation.

i woke up to literally hundreds of texts from friends and family thinking about either moving back home to india or applying to other countries for jobs. this includes me.

Gergely Orosz @gergely.pragmaticengineer.com · 19d

Those on an H1B cannot return to the US from tomorrow (Sunday) unless paying $100K. This is an out-of-the blue presidential action. We’ll see software engineers stranded abroad.

One easy to predict outcome: those on US visas will travel less… for work, for conferences etc.

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François Malaussena (@malopedia) @malauss.bsky.social · 24d

En 1970, tous les banquiers d'Irlande ont fait grève. Ils pensaient que ça mettrait le pays à genoux. Raté. Après 6 mois, tout allait toujours bien, le PIB a même augmenté. Par contre quand les éboueurs de New York ont fait grève 10 jours, il a fallu déclarer l'urgence sanitaire.

Capture d'écran du tweet cité, à savoir : https://twitter.com/BFMTV/status/1966923514180510180

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Flef @flefgraph.bsky.social · 29d

Ce week-end, j'ai pas mal donné mes tripes :/

Les papiers qui en sont sortis n'étaient pas les mieux, mais j'ai essayé de coucher un article de fond construit, sur comment fonctionne la dynamique audience/influenceurs d'un événement comme le ZEvent.

www.linkedin.com/posts/flef_z...

Cartographie du ZEvent, avec comme commentaires :
2 millions de viewers uniques
16 millions d'euros récoltés
Un résultat record grace à des communautés structurées.

En grand dans le texte : AUX RESULTATS INEGAUX

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Axel Paris @axelparis.bsky.social · Aug 18

🚀The code for Lipschitz Pruning is now online thanks to @wbrbr.bsky.social🚀

🔗 github.com/wbrbr/Lipsch...

It's a simple Vulkan app useful for experiments. Also, the monument done by @elie-michel.bsky.social is released under a CC-BY license📄

(poke @mattkeeter.com I remember you asked!)

Sample image from the Lipschitz pruning released application

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laydgeur @laydgeur.bsky.social · Aug 15

Vous avez sûrement déjà lu que la climatisation aggrave les canicules car l’air chaud rejeté à l’extérieur augmenterait la température des villes de 2 à 3°C.

Vérifions ce que disent vraiment les études scientifiques à ce sujet 🧑‍🔬

(lisez jusqu’au bout, car vous allez être 🤯🤯 à la fin)

#Thread
⬇️⬇️

Carte de Paris simulation îlot de chaleur

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Richard Sever @richardsever.bsky.social · Aug 15

"why [would] anyone intelligent enough to be a scientist choose to be one [given] the unfavorable risk-to-reward ratio "?

One of the most intelligent people you could meet offers some answers: having ideas, watching them develop, and sharing them journals.biologists.com/jcs/article/...

Why would anyone want to be a scientist?

It is difficult to fathom why anyone intelligent enough to be a scientist would actually choose to be one. Doing good science requires the utmost exertion of body, mind and spirit, yet is consistently...

journals.biologists.com

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Hugo Schott @hugoschott.bsky.social · Aug 13

Presenting this paper tomorrow morning at 9:30am, during the Lightning Fast Geometry session⚡
Come check it out if you can!

Axel Paris @axelparis.bsky.social · Aug 5

📜 New SIGGRAPH 2025 paper 🎉

❔How to compute bounding volumes for procedural Signed Distance Fields (SDFs)? This is not so trivial!

💡We propose a simple method called Sphere Carving. It extracts (convex) bounding volumes around SDFs, requires very few evaluations, and is GPU compatible.

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Brent Toderian @brenttoderian.bsky.social · Aug 12

“In Finland, the number of homeless people has fallen sharply. Those affected receive a small apartment & counselling with no preconditions. 4 out of 5 people affected make their way back into a stable life. And all this is CHEAPER than accepting homelessness.”

It costs a lot less to house people.

Finland ends homelessness and provides shelter for all in need - scoop.me

In Finland, the number of homeless people has fallen sharply. Why? The country applies the "Housing First" concept agains homelessness.

thebetter.news

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Denis Colombi @uneheuredepeine.bsky.social · Aug 9

Il y a 10 ans, il y avait d’énormes manifestations pour défendre la liberté d’expression. Aujourd’hui, critiquer le premier ministre vous envoie en garde à vue et stage de citoyenneté - à vos frais. bsky.app/profile/ludi...

Ludivine Bantigny @ludivinebantigny.bsky.social · Aug 9

Rappel des 3 phrases prononcées par cette femme à l'adresse du premier ministre:"Vous avez des comptes à rendre à tous les enfants qui se sont fait violer. Et aux gens qui n’ont pas un sou. Vous n’avez rien à faire ici M. Bayrou".
Pour ces 3 phrases:
- garde à vue
- stage de citoyenneté à ses frais

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Denis Colombi @uneheuredepeine.bsky.social · Aug 11

Par contre : plus de congés, la semaine de quatre jours et la taxation des riches - sans conditions sportives.

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Mike Cook @mtrc.bsky.social · Aug 7

Ok, calmer, post-stream digested thoughts about GPT-5. I'll keep it short.

1. A lot of the presentation was vibes-based. "Is GPT-5 better at XYZ? This person said they feel it is. Ok, moving on..." I wonder how much this is because OpenAI think a lot of people use ChatGPT based on vibes already.

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Axel Paris @axelparis.bsky.social · Aug 5

🌐 Webpage: aparis69.github.io/SphereCarvin...

🔗 Code: github.com/H-Schott/Sph...

📽️ Video: www.youtube.com/watch?v=fekn...

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Axel Paris @axelparis.bsky.social · Aug 5

Different types of bound can be used - and it is even relatively simple to extract not only one, but multiple convex bounds around the object, with guarantees!

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Axel Paris @axelparis.bsky.social · Aug 5

In practice, a usable bound can be extracted instantaneously for exact and quasi exact SDFs (50 queries). For more conservative functions where the SDF is a "bad" distance estimate (the distance is largely under estimated), then more iterations are required.

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Axel Paris @axelparis.bsky.social · Aug 5

Sphere carving has the same general requirement than Sphere Tracing: as long as the function provides a conservative distance estimate (lower-bound), then the algorithm is guaranteed to converge to the shape.

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Axel Paris @axelparis.bsky.social · Aug 5

Instead, Sphere carving iteratively approaches the surface by leveraging the SDF. Field function queries define a set of empty spheres, from which we extract intersection points that are used march towards the surface. The final point set has the property that the convex hull bounds the shape.

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Axel Paris @axelparis.bsky.social · Aug 5

A "naive" approach for such task would be to densely sample the SDF & extract a bound using a bounding box or convex hull of the samples. This is however expensive (lots of queries) even on GPU, especially if the SDF is made of thousands of primitives.

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Axel Paris @axelparis.bsky.social · Aug 5

📜 New SIGGRAPH 2025 paper 🎉

❔How to compute bounding volumes for procedural Signed Distance Fields (SDFs)? This is not so trivial!

💡We propose a simple method called Sphere Carving. It extracts (convex) bounding volumes around SDFs, requires very few evaluations, and is GPU compatible.

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Emilie Yu @emxtyu.bsky.social · Aug 4

We're looking forward to presenting our talk at #SIGGRAPH2025 on Sunday Aug. 10 - 11AM, in West Building, Rooms 301-305!

Emilie Yu @emxtyu.bsky.social · Jun 1

Ever wondered how badly we're all addicted to buying new GPUs in graphics labs?

Come see our talk at #SIGGRAPH2025 to discuss how we can collectively move "Towards a sustainable use of GPUs in Graphics Research"

with @elie-michel.bsky.social @axelparis.bsky.social Octave Crespel and Felix Hähnlein

MOTIVATION
Graphical Processing Units (GPUs) are at the core of Computer Graphics research. These chips are critical for rendering images, processing geometric data, and training machine learning models. Yet, the production and disposal of GPUs emits CO2 and results in toxic e-waste [1].

METHOD
We surveyed 888 papers presented at SIGGRAPH (premier conference for computer graphics research), from 2018 to 2024, and systematically gathered GPU models cited in the text.

We then contextualize the hardware reported in papers with publicly available data of consumers’ hardware [2, 3].

REFERENCES
[1] CRAWFORD, KATE. The Atlas of AI: Power, Politics, and the Planetary Costs of Artificial Intelligence. Yale University Press, 2021.
[2] STEAM. Steam Hardware Survey. https://store.steampowered.com/hwsurvey
[3] BLENDER. Blender Open Data. https://opendata.blender.org

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Syndicat des Travailleureuses du Jeu Vidéo @stjv.fr · Jul 30

🇬🇧 ✊ Virtuos France is on strike! After the success of Oblivion Remastered, management decided to reward the team with…A layoffs plan.

A strike has started on July 10th and our comrades need support. STJV set up a strike fund:

www.helloasso.com/as...

Caisse de grève Virtuos

Faire un don à Syndicat des Travailleurs et Travailleuses du Jeu Video - Caisse de grève Virtuos

www.helloasso.com

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Syndicat des Travailleureuses du Jeu Vidéo @stjv.fr · Jul 30

✊ Virtuos en grève ! Après avoir sorti Oblivion Remastered avec un grand succès, la direction récompense les équipes avec…Un plan de licenciements.

La mobilisation a démarré le 10 juillet et iels ont besoin de soutien. Le STJV a mis en place une caisse de grève :

www.helloasso.com/as...

Caisse de grève Virtuos

Faire un don à Syndicat des Travailleurs et Travailleuses du Jeu Video - Caisse de grève Virtuos

www.helloasso.com

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