Several drops of ink in water. This simulation is based on the tutorial by BlenderDiplom: http://blenderdiplom.com/en/tutorials/all-tutorials/615-tutorial-ink-drop-effect-with-cycles.html
Simulation: https://www.youtube.com/watch?v=U_tCv4LG7eE
Bettter resolution on my ArtStation: https://www.artstation.com/artwork/2yweJ
