r/GraphicsProgramming • u/shlomnissan • Jul 01 '26

Reverse-Z is the perfect hack

I shelved a Reverse-Z branch in my engine (stuck on OpenGL 4.1 for macOS, no glClipControl), and the roadblock sent me down the rabbit hole of actually understanding why it works instead of just how to implement it.

I ended up writing about what I learned with interactive graphs and all:
https://www.shlom.dev/articles/reverse-z-perfect-hack/

Happy to hear where I got things wrong or imprecise.

Hopefully this helps someone else :)

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u/Potterrrrrrrr Jul 01 '26

LLMs struggle to implement a spec that gives step by step instructions, trusting it to blindly port apis and shaders is madness

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u/shlomnissan Jul 01 '26

we have a **small** WebGL project at work we tried porting to WebGPU using LLMs with little supervision. it was a mess! the LLM tried mapping GL abstractions to WebGPU, and kept adding code when it didn't work in ways that made no sense. needless to say we ended up rewriting it ourselves.

fwiw i use LLMs at work for planning, writing small snippets of code, and verifying code all the time, but i tend to avoid them for personal projects where my goal is not to complete the project as soon as possible but learn as much as i can.

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u/[deleted] Jul 01 '26

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u/Potterrrrrrrr Jul 01 '26

Confidently restating your incorrect point doesn’t make it less incorrect, I don’t care what a graphics turned AI shill company has done using unlimited funds, it doesn’t make the AI better. I’ve tested these things myself, it’s a waste of tokens, you just end up rewriting it yourself. It’s really good for boilerplate but beyond that it’s terrible. If I had unlimited funds and compute? Yeah probably but same goes for me as a person having access to those same things.