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Comment by DonHopkins

I love Goodsell’s paintings too: they make the molecular world feel simultaneously beautiful, crowded, wonderfully strange, and colorfully tasty.

This reminded me of Tim Davison’s LifeBrush, an interactive VR painting and simulation system explicitly inspired by Goodsell’s illustrations.

In his thesis, Davison describes using it to "structurally recreate, simulate and step inside" famous Goodsell illustrations -- the cytoskeleton demo is a striking example of a painting becoming a world you can enter and set in motion:

https://www.youtube.com/watch?v=6CsxADBpal0

https://hdl.handle.net/1880/111493

I first called LifeBrush "Emacs for Cytoplasm" in a Boids thread and asked Davison whether the molecular motion was slowed down. He replied that medium-sized proteins move around 5 m/s, and that LifeBrush deliberately slows and smooths Brownian motion for illustration. The code was open source; at the time it required a VR headset and had a clunky, research-grade interface.

https://news.ycombinator.com/item?id=22715199

https://news.ycombinator.com/item?id=22724602

https://github.com/timdecode/LifeBrush

The interaction is the magic: in the overview, a ribosome moves along mRNA as tRNA brings amino acids and a polypeptide chain grows. You can grab the ribosome and move it where you want, rather than wait for Brownian motion.

I described it as dragging the ribosome’s "lazy ass" through "tRNA pasta and mRNA meatballs." It’s a scientific illustration you can play with, not a literal molecular-dynamics visualization.

https://www.youtube.com/watch?v=5LBHRyGxLGI

https://www.youtube.com/watch?v=624F5iaCKco

https://www.youtube.com/watch?v=L482dpH9S8o

https://www.youtube.com/watch?v=bUnTEI9QZPE

Davison’s work has since grown into CellWalk, a guided, interactive tour through a bacterial cell, from the whole cell down to its atoms, for iPhone, iPad, and Apple Vision Pro.

And here the Goodsell connection is even more direct: Davison’s site credits David Goodsell, Ludovic Autin, and Martina Maritan with the CellWalk model and tour, based on their whole-cell paper. Davison is now CEO and cofounder of Ako Biotica, the company behind CellWalk.

https://timd.ca/

https://www.youtube.com/watch?v=r8DOAPPjMw0

https://cellwalk.ca/

https://doi.org/10.1016/j.jmb.2021.167351

LifeBrush papers: the 2018 conference paper, followed by the 2019 Computers & Graphics article on painting, simulating, and visualizing dense biomolecular environments.

https://doi.org/10.1109/CW.2018.00017

https://doi.org/10.1016/j.cag.2019.05.006

parent DonHopkins 19 days ago

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