nVidia Flex Smoke Simulation

Hi guys. I was faced with the task of implementing physically correct smoke in Unity, and I found nVidia Flex to be one of the best solutions for Unity. I tried in every possible way to configure the FlexContainer in nVidia Flex to achieve the results shown in the video, but I could not do anything, something similar, maybe someone tried to make smoke on Unity using nVidia Flex, could you tell what parameters you used ?