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I'm trying to create some screen space effects such as SSR and Global ilumination. I've already noticed that it is donne using rayMarching and depth buffer. I am familiar with rayMarching algorithm in context of unity and shadertoy . However I'm not understating how does it work in depth buffer, how does rayMarching in depth buffers is donne? Can anyone show me some minimal code on how to do it?

Icaro Amorim
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  • On Shadertoy, I found [a demo](https://www.shadertoy.com/view/XdycWy) of two-pass ray marching using a depth buffer (or "zbuffer"). – Anderson Green Dec 24 '20 at 20:26

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