This is generated by intersecting rays with a signed distance function!
Here's an excellent explanation of how it works: http://jamie-wong.com/2016/07/15/ray-marching-signed-distance-functions/
Here's a page from the creator of this model with more examples: http://www.iquilezles.org/www/articles/raymarchingdf/raymarchingdf.htm
Here's an excellent explanation of how it works: http://jamie-wong.com/2016/07/15/ray-marching-signed-distance-functions/
Here's a page from the creator of this model with more examples: http://www.iquilezles.org/www/articles/raymarchingdf/raymarchingdf.htm
