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Generative algorithms are fascinating, and differential line growth is no different.
These coasters are procedurally generated using Houdini. If you want to know a bit more about this you can find my inspiration here, and you can see the algorithm in action in an animated GIF here.
They are quite mesmerizing to watch as they print, since the top is a single connected line.
There are a few versions included:
They're designed to print at 0.45mm extrusion width, 0.2mm layer height, and it's quite important to disable Fill Gaps on the slicer settings. You can always use my pre-sliced .3mf files that already have a color change setup and all the necessary settings.