Ara 3D

Procedural 3D geometry • Construction and infra scale models • GPU instancing •
Daily geometry demos • Tools for AEC professionals & creators

[Maxime Chevalier @Love2Code]

Claude Code ported my GLB mesh loader and skeletal animation code from Plush to Rust in all of 5 minutes... That was... faster than I expected.

[mrdoob @mrdoob]

Spent a bunch of tokens over the last few weeks building a fully procedural New York simulation.

https://t.co/YSrGNoIYsK

It's only 784KB gzipped and the code is on github, so you can do whatever you want with it ✌️

[Kyle Anthony Miller @kyleanthony]

Making mood boards never gets old

[Maxime Chevalier @Love2Code]

Had to show you this one because I think this is genuinely cool. My WIP networked 3D engine that runs in a browser. Also demoing live-editing the world, and prefab objects! :)

[Sasha Flyer @sasha_flyer_art]

Soft Gravity 🌀

[Maxime Chevalier @Love2Code]

I repurposed some of my fighter plane simulator code to build a space fighter game where you're racing to destroy the enemy mothership's antimatter core before it can charge a weapon that will destroy the earth. Still a work in progress. Let me know if you would like to play it!

[Code Geek @codek_tv]

Euler's Formula ✍️

[Maxime Chevalier @Love2Code]

I put together a GLB 3D model renderer that supports skeletal animation. It's written in Plush, the interpreted language I'm building. To implement this, I first added JSON and JPEG libraries to Plush 👩‍💻 🧸 📷

The source code of the model viewer is here:
https://t.co/0edphh6ZGt

[Matt Shumer @mattshumer_]

A lot of people are asking how I pulled off these super long-horizon builds with Astra.

Astra is extremely powerful, but by default it struggled with a task this difficult. I tested a bunch of approaches to get past this, and the one I landed on is something I'm calling the Manager Loop.

It's basically a couple of tricks we used to use with much less capable models a couple of years ago, with a few new ideas layered on top. Turns out that when you put those together and apply them to Astra, its ability to do extremely difficult long-horizon tasks goes up dramatically.

Here's how it works:

1. Launch an agent (I'm calling this one the "manager"). Chat with it about what you want to get done, and have it build a massive checklist of to-dos, then break that checklist into phases.

2. The manager then spawns a second Codex agent in a separate thread (the "implementer"). The two agents can message each other.

3. Put the manager in /goal mode, and tell it to run each phase on the implementer in /goal mode.

4. The manager messages the implementer: "/goal Complete phase one completely, extremely well." The implementer doesn't stop until that phase is done, then messages the manager back. The manager tells it to start phase two. They repeat until every phase is finished, completely autonomously.

Why I think this works: over a long-horizon task, Astra tends to asymptote. It gets way further than previous models, but at a certain point it kind of just stops improving against the goal as quickly as it did before. It gets stuck in the minutiae, focusing way too much on small details, and overall progress stalls. The Manager Loop forces it to work piecemeal, one phase at a time. It's essentially how a human would steer a model, except the model is doing the steering for me.

That's actually how this started. I was having the model write the checklist and break it into phases, and then I was doing the manager's job by hand. At some point I thought, "Wait, why can't I just get a separate AI to do this?" That's what unlocked full autonomy, which is super useful.

A wording detail that seemed to matter: I ask for each phase to be done "extremely well," not "perfectly." Maybe I'm reading too much into it, but asking for "perfect" sent the model right back into the minutiae. "Extremely well" implies it's allowed to move on once it's good enough, and that worked better in my testing.

One more trick that I think helps (this one is more of a hunch, but it was useful for me): have the implementer build a simple HTML page with the full checklist on it. The implementer checks boxes off as it goes and updates a counter, and the page has a chart of # of boxes ticked over time.

Obviously the boxes aren't all equal, but it forces the model to notice things like "I haven't made progress in a while, time to move on." You can even put this in the prompt directly, like: "if you haven't ticked a box in X amount of time, move on". That helps a lot.

I also ran 96 sub-agents at a time. You can change this in your Codex config (or just ask Codex to change it).

This got me far better long-horizon performance than anything else I tried. I'll be sharing more in the coming days!

[Tom Krcha @tomkrcha]

GPT-6 Astra + @threejs is insane. We are way beyond static models. We are engineering living worlds in code now. There are no "3D model files" in this demo. Both trains are generated at runtime from Typescript/Three.js code using dimensions, profiles, and geometry functions. Wheel motion and explode/reassemble animations are also entirely code-driven. Runs super smooth inside the browser.

[Maxime Chevalier @Love2Code]

Demo day: Tremor, a mini Quake-like 3D game engine, and neural network word detection in Plush! :)

[Maxime Chevalier @Love2Code]

just published a blog post about the music app I've been building as a side-project. I'm very happy with the way it turned out 😃

https://t.co/WPVZxzCXdM

[hal_0009 @hal_chemy]

49 Shades of Loop