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PACK ⬕ Mask Reaction Diff
A reaction-diffusion simulation visualizes how two chemicals react and diffuse together to form seemingly organic patterns over time. Visualizing uncharted domains of computed liquids. I find the abstract shapes to be strangely beautiful and so I've long wanted to experiment with it but have always assumed that it involved some heavy computations. Then earlier this year I stumbled across a tutorial showing how to set up reaction-diffusion visuals from scratch. Time to play with digital liquid!
Because I'm such an After Effects addict, I wondered if this technique could be pulled off using AE. With a bit of research I found a really well thought out After Effects project named Alive Tool. So I watched the tutorial which described how it was set up and I realized that it didn't utilize any custom plugins, just native FX, and hundreds of nested comps. It also included some interesting possibilities such as an Start/End Shape, Overlay Map, Vector Map, Time/Size Map, Grow Mask, FX stack with control shortcuts, and border erasure.
I felt like there was still so much to explore in experimenting with a true reaction-diffusion simulation engine and yet I'd reached the limit of the technique using just After Effects. So I started researching various reaction-diffusion codebases that I could use to run sims in real-time. I found a few different options but the RD Tool was easily the ideal outlier since I felt it was the most expressive due to its unique attributes, dual interactive patterns, real-time 120fps sims, and was intuitive to play with. But the code wasn't open-source and there wasn't a license included on the webpage. And so I sent the author of RD Tool, Karl Sims, an email asking if I could have his permission to record footage using the RD Tool and distribute it within this VJ pack. I was thrilled when he agreed. Much respect!
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