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This - in my eyes - is the future of rendering: A coding model (LLM) creates a rough outline of the game with simple geometry but without shading. Then a video AI model generates the final beautiful image. Meet "Code World Model":

18,601 views • 2 months ago •via X (Twitter)

40 Comments

Matt's profile picture
Matt2 months ago

I agree. I Experimented with this a bit. In a few years the AI accelerator hardware will support this with better quality than deterministic rendering.

Mark Kretschmann's profile picture
Mark Kretschmann2 months ago

Very cool!

Webster | JARVIS's profile picture
Webster | JARVIS2 months ago

Interesting, but how do you handle latency and consistency between frames when a video model owns the final pixel pass? Seems like a hard constraint for interactive rendering.

Mark Kretschmann's profile picture
Mark Kretschmann2 months ago

Temporal consistency can be achieved by considering previous frames.

Mark Z's profile picture
Mark Z2 months ago

That is nice and if you have a site you built for that: - FREE to list and if you want to or see a competitor listed, advertise on their listing page.

Manu_TechAndGames's profile picture
Manu_TechAndGames2 months ago

I don't see the point of the coding model here. You can take a game engine, make it generate the proxy part, with full designer control, and then render it with the model. Am I missing something obvious? Also, I'm not sure how different it is from Lucy model from decart.

Mark Kretschmann's profile picture
Mark Kretschmann2 months ago

The coding model makes it possible to prompt the scene

Manu_TechAndGames's profile picture
Manu_TechAndGames2 months ago

Also , coherency is still an unsolved issue, as far as I know.

Mark Kretschmann's profile picture
Mark Kretschmann2 months ago

Well, that's exactly what this technique aims to solve.

Manu_TechAndGames's profile picture
Manu_TechAndGames2 months ago

It solves that were a character should be, it will always be. But the appearance of the character is still subject to changes. You can spot it in the videos, the background scenery is not consistent. Don't get me wrong, it's interesting. But there is still a lot of work !

Charuru Charuru's profile picture
Charuru Charuru2 months ago

@mark_k I think you just need a backwards pass where you put a diffusion generated results back into the code to store it

Manu_TechAndGames's profile picture
Manu_TechAndGames2 months ago

@mark_k Maybe I understood wrong, but you can't store all the frames of your game. The point is that if a player is going to a location he already visited before, but everything has changed, it's just a bad experience. A model like genie3 only have 1 minute buffer.

Charuru Charuru's profile picture
Charuru Charuru2 months ago

@mark_k You modify your original geometry with vastly more detail based on the generation. This means you don't need to store per frame data, everything is already in the 3D model. That's the point

Manu_TechAndGames's profile picture
Manu_TechAndGames2 months ago

@mark_k Interesting idea. It means you need a runtime video to 3d model. In this case, isn't it better to use a world model that generates geometry in the first place, like marble?

Trevor Green's profile picture
Trevor Green2 months ago

Possibly. But the physics and object persistence. Ideally there is a data layer of context behind anything that is generative that is authoritative. Where the rules live. You could potentially make the output just do that magically but somewhere you have to know that a persistent thing exists and you want it to keep existing.

Mark Kretschmann's profile picture
Mark Kretschmann2 months ago

That's why it's hybrid

Trevor Green's profile picture
Trevor Green2 months ago

I’m making something that might kind of be like that. Eventually. But I think it might be more baked than inferenced. Like you generate stuff and it becomes the context base and the inferencing is the last layer. Like a reshade. But you populate enough base that if you don’t have the reshade it still works bare bones. And the AI layer is really the still the lighting and particle effects. So the thing that nvidia is doing with the faces now. When it does that. A bunch of the face bakes in. Just a thought. It’s all an optimization problem in the end. So we shall see how that happens. Balancing these things to the performance of common denominator hardware. I think the adaptive authoring will come before the full inferencing. But who knows. Maybe m not sure the required size of the models to be generalize reshaders. Fun to think about.

Jonny Jelinek 🔥's profile picture
Jonny Jelinek 🔥2 months ago

Wooowiee!! 😍

Enzo's profile picture
Enzo2 months ago

nice idea probably correct visuals deterministically derived from code doesn't capture the 'art' while Image Generation does

Kiran Adimatyam's profile picture
Kiran Adimatyam2 months ago

Nice. can you elaborate the tools used?

Mark Kretschmann's profile picture
Mark Kretschmann2 months ago

Check the quoted post

Kiran Adimatyam's profile picture
Kiran Adimatyam2 months ago

Thank you for highlighting. 🙏🏼

RE:Skob's profile picture
RE:Skob2 months ago

The progress is crazy. Less than a year ago when the genie model came out there was no world consistency. When you turned around the scene would completely change and that looks almost solved now

Hussain Hashim | Building SundayBack's profile picture
Hussain Hashim | Building SundayBack2 months ago

@mark_k this is wild! could change how we think about game design. real-time adjustments might get easier.

Tomás Crucial's profile picture
Tomás Crucial2 months ago

La visión de la que te llevo hablando 2 años @regniblod

volya's profile picture
volya2 months ago

how would real-time interactions and input fit into this pipeline?

Mark Kretschmann's profile picture
Mark Kretschmann2 months ago

You can see the interaction in the video. It's input for the coding model.

Nikhil Shahane's profile picture
Nikhil Shahane2 months ago

This is super interesting. so how does the whole pipeline work? If a video model creates it - how do we bring it back into the engine to make it interactable? Or is that not required at all?

Mark Kretschmann's profile picture
Mark Kretschmann2 months ago

That's why it's hybrid

Nikhil Shahane's profile picture
Nikhil Shahane2 months ago

I haven't really had a chance to understand how these workflows actually pan out. This is really cool - will look it up. Thanks!

ikan laut's profile picture
ikan laut2 months ago

this is very interesting

Anthony Polyakov's profile picture
Anthony Polyakov2 months ago

The first stage could be a JEPA model, this should be way more efficient

Devance's profile picture
Devance2 months ago

The interesting part is how fast the baseline for “impressive” is moving. What looked like a portfolio piece six months ago now feels like a prompt experiment.

Sean Florez's profile picture
Sean Florez2 months ago

models will converge eventually

Fajar M Reza's profile picture
Fajar M Reza2 months ago

Code World Models separate structural generation from visual rendering, enabling cheaper iteration.

LiveFromVR's profile picture
LiveFromVR2 months ago

This workflow is really good but so is just recording yourself or even legos doing stuff and then converting that to the final

Chen Yiwen @eccv 2026's profile picture
Chen Yiwen @eccv 20262 months ago

Thanks, Mark! I actually believe that even simple geometry may no longer be necessary in the future. Instead, the video model could be conditioned on bounding boxes paired with text prompts, all automatically generated and refined by the coding agent.

Tim Reha's profile picture
Tim Reha2 months ago

Right on target, its super cool

Lone Whiplash Dev - Try it now for free!'s profile picture
Lone Whiplash Dev - Try it now for free!2 months ago

of course this is where its going. Going one step further - you could just use AI to generate all the objects/assets on the wireframe map as 3d models. This would ensure a consistent look for everyone if necessary. Like - dream a little bigger.

Nathan Wei's profile picture
Nathan Wei2 months ago

This is super cool. I've been working on something similar. Would love to chat if you have the time!

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