Diffusion-limited aggregation in 3D. 10 million particles (spheres). Ray-traced. Be sure to check out the full resolution here: https://www.michaelfogleman.com/static/dlaf-3d-10m-2048spp-4096px.png …pic.twitter.com/WWOq8zlilZ
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Not for most plants, I think. DLA happens when "stuff" from the environment comes in and sticks to what's already there (think of dust bunnies or coral), whereas plants usually grow from within. There're probably exceptions though (it's biology...)
In a way plants create similar structures but it is in the pursuit of light instead of particles depositing. The plant grows toward light and there is more photons in unoccluded areas. Sortof the same as with the brownian moving particles in DLA... almost.
For plants might be tricky, because shape is determined by the information embedded in the cell and also by physical constrains (light searching could be one). It could also be an optimization problem: given a set of limited resources, fractals optimize the surface you can cover.
I was thinking that intracellular concentrations "come in", too. E.g. CO2 and hormones.
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