This question already has an answer here:
- How can I generate biome borders? 1 answer
After I've found this post I'm curious what kind of algorithms they use to generate these shapes (second image).
I can't imagine that the basic shapes are basing on a perlin or simplex noise or a voronoi diagram. With voronoi I'm a bit uncertain to be honest.
Well, so what do you think. What algorithm could be used to generate biome borders like they do?