Fluid in ARKit or SceneKit

Hi guys, in one of the video of WWDC 21 I saw this spectacular image of a green fluid over the sofa 🛋

i can’t find to much tutorial online, How could be done this? I was looking into the particle system of SceneKit but looks like not doing exactly the same think( is more for smoke and fire) this fluid look more 3D.

what I should look for reproduce this fluid.. thanks Looking for some help to start my research.