I love Voronoi diagrams, and especially Centroidal Voronoi Tesselations. They relate to many natural phenomena such as honeycombs and soap bubbles. I used that as the basis for an art installation I did for Burning Man: http://www.flowandwonder.com.

Another technique for computing them on the GPU, not sure how related it is to OP's technique: http://www.iquilezles.org/www/articles/voronoilines/voronoil...

Edit: shadertoy link: https://www.shadertoy.com/view/ldl3W8