CSS is DOOMed
msephton
261 points
61 comments
March 28, 2026
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Discussion Highlights (19 comments)
Levitating
Is CSS that awesome? It's still a language designed for styling webpages with 30 year of added features. I'd argue something purpose built would be a much better tool for the potential usecases people try to use CSS for now. I guess I am asking, if modern CSS is so awesome, it's awesome compared to what exactly?
0x737368
With how these things are going, soon hackers will be challenging themselves to run Crysis on calculators and microwaves
OrangePilled
This page could use some "Practical CSS scroll snapping": https://css-tricks.com/practical-css-scroll-snapping/
sheept
Creating 3D scenes with CSS has always been possible[0], but like this project, it's required JavaScript for interactivity. But there's a lot more CSS features now. While in the past, Turing completeness in CSS required humans to click on checkboxes, now CSS can emulate an entire CPU without JavaScript or requiring user interaction.[1] So I wonder if DOOM could be purely CSS too, in real time. [0]: https://keithclark.co.uk/labs/css-fps/ [1]: https://lyra.horse/x86css/
sgbeal
It would be really interesting to see this without the texturing applied.
lysace
The game logic runs in JavaScript Also: a modern CPU is around 10000x faster than the 486 CPU Doom was designed for. Per core.
rkagerer
But where can I try it out in my browser? EDIT: https://cssdoom.wtf/
notnmeyer
at this point i’m more interested in what _can’t_ run doom.
josefrichter
this is wild.
anthk
https://freedom.github.io Use Deutex, GNU make and Pillow for Python to compile. Then wou will have up-to-date IWADS to be used aywhere. No need to put ID copyrights, just a mention to FreeDoom creators.
jsjsjxxnnd
In recent years CSS has become closer to a full programming language through experimental features, for example in 2025 they added if statements and some math functions like modulo https://www.simplethread.com/new-and-upcoming-css-features-i...
fnord77
> CSS is awesome. No
MrDOS
In 2006, Ars Technica published an April Fool's article[0] declaring that the perennially-forthcoming Duke Nukem Forever would finally see the light of day... as... a browser game ! Ho ho, how droll. Crazy to see how far we've come. [0]: https://arstechnica.com/gaming/2006/04/forever/
socalgal2
FYI: this is a cool hack and very impressive, but ... don't do this. That fact that it runs doesn't make it a good idea. Like running DOOM in Excel ( https://github.com/Pranshul-Thakur/DOOM-in-excel ) or making a DIV for every pixel and rendering by changing colors of divs https://news.ycombinator.com/item?id=46409359 Use 3D CSS to enhance a 2D page with some flair. But be aware, 3D CSS, it's trying to solve things that most realtime 3D rendering does not, like intersecting planes need to be subdivided in order to correctly handle transparency. This means 3D CSS has an O(N^2) or worse type of issue vs rendering yourself using WebGL or WebGPU where you'd avoid those issues. This demo probably does not intersect any planes but the browser itself has to check for those intersections anyway. TL;DR: If you're going to make a 3D web game use WebGL or WebGPU, not 3D CSS Very cool demo though!
adi_kurian
Really cool!
pverheggen
Seriously impressive, especially the viewport culling trick, not seen that one before. FYI if you want to use inspect element, the viewport div consumes mouse elements, you can get rid of this with #viewport { pointer-events: none; } #viewport * { pointer-events: initial; }
quantummagic
This is great. And Firefox should get kudos too, for running it the best, with fewest workarounds needed.
h1fra
So impressive! Bonus, you can wall hack by just deleting a div ahah
gfody
super playable on ff but I got stuck here https://imgur.com/a/6nXbPY3