Realistic Fog That Reacts to Players in Unity
git-amend
Jul 26, 2026 13:00
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In this line-by-line tutorial we build fully interactive fog in Unity from scratch. A single compute shader runs a lightweight density simulation that reacts to the player and static obstacles, using semi-Lagrangian advection and a simple mathematical velocity field. We then render it with a short ray-marching shader that turns the flat density texture into convincing volumetric fog. Along the way you’ll see practical techniques—ping-pong buffers, Beer-Lambert compositing, and object-space ray marching—that you can reuse in many other effects.
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▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
*Source code:* https://gist.github.com/adammyhre/192275218a61156680e1186752418a1f
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Unity Utility Library: https://github.com/adammyhre/Unity-Utils
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