A live coding jam session in Shadertoy (shadertoy.com/view/Xd23zh).
What you see is a GLSL shader runing in a full screen quad. The shader traces rays along the 3d world and accumulates density and color as it traverses the procedural cloud shapes. This procedural shape is mainly made of fbm() and noise().
It runs realtime in all the PCs I have tried it on.
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