April 25th, 2025

World Emulation via DNN

Ollin Boer Bohan developed a neural network-based "neural world" for exploring a forest trail online, enhancing image generation through user controls and recorded video, envisioning it as a unique creative medium.

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World Emulation via DNN

Ollin Boer Bohan has developed a neural network-based "neural world" that allows users to explore a forest trail through their web browser. This innovative approach utilizes a neural network to generate images based on previous frames and user controls, without traditional game development elements like level geometry or scripted animations. The project builds on Bohan's earlier work, where he created a 2D game world by training a neural network on gameplay videos. The new neural world was created by recording approximately 15 minutes of video while walking through a forest, which was then processed into input-output pairs for training. Despite initial challenges in achieving a coherent output, Bohan made several upgrades to the training process, including enhancing control inputs, increasing memory capacity, and refining the network architecture. The final model, which consists of around 5 million parameters, was trained on a dataset of 22,814 frames. Bohan argues that while traditional game worlds are crafted like paintings, neural worlds are akin to photographs, capturing real-life details directly from recorded data. He envisions a future where neural worlds can achieve high fidelity and become a distinct creative medium, similar to how photography evolved. Bohan encourages programmers interested in world modeling to explore existing frameworks and expresses a desire to continue improving this technology.

- Bohan created a neural world that generates images based on recorded video and user controls.

- The project builds on previous work with 2D game emulation using neural networks.

- Significant upgrades to the training process improved the quality of the generated world.

- Bohan compares neural worlds to photographs, emphasizing their basis in real-world recordings.

- He envisions future advancements that could make neural worlds a unique creative medium.

AI: What people are saying
The comments on the article about Ollin Boer Bohan's neural network-based "neural world" reveal a mix of excitement and curiosity about the technology.
  • Many users express admiration for the innovative approach and potential applications of the project.
  • There are inquiries about the technical knowledge required to create similar models and the feasibility of open-sourcing the training code.
  • Some comments draw comparisons to existing technologies and express a desire for further exploration in related areas.
  • Users appreciate the transparency regarding the challenges faced during development.
  • Questions arise about the computational resources needed for training the models.
Link Icon 17 comments
By @das_keyboard - 15 minutes
> So, if traditional game worlds are paintings, neural worlds are photographs. Information flows from sensor to screen without passing through human hands.

I don't get this analogy at all. Instead of a human information flows through a neural network which alters the information.

> Every lifelike detail in the final world is only there because my phone recorded it.

I might be wrong here but I don't think this is true. It might also be there because the network inferred that it is there based on previous data.

Imo this just takes the human out of a artistic process - creating video game worlds and I'm not sure if this is worth archiving.

By @Imanari - 11 minutes
Amazing work. Could you elaborate on the model architecture and the process that lead you to using this architecture?
By @titouanch - 22 minutes
This is very impressive for a hobby project. I was wondering if you were planning to release the source code. Being able to create client-hosted, low-requirement neural networks for world generation could be really useful for game dev or artistic projects.
By @Valk3_ - about 3 hours
This might be a vague question, but what kind of intuition or knowledge do you need to work with these kind of things, say if you want to make your own model? Is it just having experience with image generation and trying to incorporate relevant inputs that you would expect in a 3D world, like the control information you added for instance?
By @nopakos - about 2 hours
Next we should try "Excel emulation via Neural Network". We get rid of a lot of intermediate steps, calculations, user interface etc!

What could go wrong?

Jokes aside, this is insanely cool!

By @AndrewKemendo - about 8 hours
I think this is very interesting because you seem to have reinvented NeRF, if I’m understanding it correctly. I only did one pass through but it looks at first glance like a different approach entirely.

More interesting is that you made an easy to use environment authoring tool that (I haven’t tried it yet) seems really slick.

Both of those are impressive alone but together that’s very exciting.

By @tehsauce - about 7 hours
I love this! Your results seem comparable to the counter strike or minecraft models from a bit ago with massively less compute and data. It's particularly cool that it uses real world data. I've been wanting to do something like this for a while, like capturing a large dataset while backpacking in the cascades :)

I didn't see it in an obvious place on your github, do you have any plans to open source the training code?

By @udia - about 8 hours
Very nice work. Seems very similar to the Oasis Minecraft simulator.

https://oasis.decart.ai/

By @gitroom - about 4 hours
Gotta say, Ive always wanted to try building something like this myself. That kind of grind pays off way more than shiny announcements imo.
By @puchatek - about 9 hours
This is great but I think I'll stick to mushrooms.
By @bjornsing - about 4 hours
What used to be cutting edge research not so long ago is now a fun hobby project. I love it.
By @alain94040 - about 9 hours
Appreciate this article that shows some failures on the way to a great result. Too many times, people only show how the polished end-result: look, I trained this AI and it produces these great results. The world dissolving was very interesting to see, even if I'm not sure I understand how it got fixed.
By @quantumHazer - about 10 hours
Is this a solo/personal project? If it is is indeed very cool.

Is OP the blog’s author? Because in the post the author said that the purpose of the project is to show why NN are truly special and I wanted a more articulate view of why he/she thinks that? Good work anyway!

By @ilaksh - about 7 hours
This seems incredibly powerful.

Imagine a similar technique but with productivity software.

And a pre-trained network that adapts quickly.

By @throwaway314155 - about 9 hours
Really cool. How much compute did you require to successfully train these models? Is it in the ballpark of something you could do with a single gaming GPU? Or did you spin up something fancier?

edit: I see now that you mention a pricepoint of 100 GPU-hours/roughly 100$. My mistake.

By @bitwize - about 8 hours
I want to see a spiritual successor to LSD: Dream Emulator based on this.

https://en.m.wikipedia.org/wiki/LSD:_Dream_Emulator