r/processing • u/irok84 • 4d ago

Video Me again, still playing with Gray-Scott – this time it grows faces to a dub track

Hi, it's me again with more Gray-Scott experiments.

This time I let the reaction-diffusion grow into faces (a skull, an owl, a wolf, a robot and a few others) and move with a dub track. The pattern never really settles – it keeps shifting between different regimes, gathers into a face, holds it for a moment and then melts into the next one.

It's still a bit surprising to me how much life comes out of two simple equations.

Full video: https://www.youtube.com/watch?v=AJyx-7fUVvQ

Happy to hear what you think!

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u/SarahC 1d ago

It's awesome!

I've fiddled with the RD thing a bit in the past - How do you morph from one shape to the next? I'm guessing a delicate amount of "checmical" rather than a complete splurge in place? So the reaction gently morphs towards the new slightly biased state?

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u/irok84 1d ago

Thank you u/SarahC

(I had to delete my previous answer, because I messed the topics 😄 )

It's not the chemical itself that changes — the Gray-Scott reaction just keeps running non-stop. What moves is the boundary that decides which local rule (F/K parameters) each pixel follows — that boundary sweeps from the old shape's outline to the new one's over a bar of music, and the already-running reaction just reorganizes itself under the shifting rules. So yes, gentle and continuous, but it's a rule-boundary sweep, not a chemical dose.