A custom texture by Keijiro Takahashi that generates organic animation with a reaction-diffusion system.
The artist was inspired be these two videos:
Reaction-Diffusion by Nobutaka Kitahara
DIFFUSION by Kouhei Nakama
Unity 2017.1 is still in beta stage, so the specification could be changed in the final release version. You can get all the project files for free here.