Author here. Rayshader is an R package for mapping and 3D data visualization, and I've been working on this feature for a while now. Here are links to previous posts I've made on HN about the package:<p>Show HN: A raytracer to shade, plot, and 3D print topographic maps in R, part 4 <a href="http://www.tylermw.com/3d-printing-rayshader/" rel="nofollow">http://www.tylermw.com/3d-printing-rayshader/</a><p>Show HN: A raytracer to shade and visualize topographic maps in R, part 3 <a href="http://www.tylermw.com/3d-maps-with-rayshader/" rel="nofollow">http://www.tylermw.com/3d-maps-with-rayshader/</a><p>Show HN: A raytracer to shade topographic maps in R, Part 2 <a href="http://www.tylermw.com/making-beautiful-maps/" rel="nofollow">http://www.tylermw.com/making-beautiful-maps/</a><p>Show HN: A raytracer to shade topographic maps in R <a href="http://tylermw.com/throwing-shade/" rel="nofollow">http://tylermw.com/throwing-shade/</a>