WebGL Demo: Brisk Hindsight
2017-03-06 from http://codepen.io/ge1doot/pen/LRwXZV (public codepen has MIT license. [2020-07-14 https://blog.codepen.io/documentation/licensing/ ] )
2017-03-06 from http://codepen.io/ge1doot/pen/LRwXZV (public codepen has MIT license. [2020-07-14 https://blog.codepen.io/documentation/licensing/ ] )