Joachim Gassen (twitter) tweeted last year:
#3Dprinting data with #rayshader. First time I have something in my hand that is made entirely out of data and R. Thanks to @tylermorganwall and the #rstats community for making this happen! Blog post: https://bit.ly/2BvVKlX
They use the package rayshader to create the 3d representation that is converted to STL which can be used in his 3d printer’s software.
See the entire process here.