[hamoid]

By accident I figured out how to draw a simple Voronoi pattern: draw lots of planes at the same distance from a center point, each plane perpendicular to that center point. https://www.openprocessing.org/sketch/611667 (click </> to see the code). Probably someone did it before already :)

[kaffeemitsahne]

Sounds similar to drawing intersecting cones at each point, which is a pretty common method I think. For example: http://alexbeutel.com/webgl/voronoi.html A nice thing about that is if you draw cones with just 4 sides (so, pyramids..) you get a manhattan distance voronoi pattern (or something that looks very similar at least).