So i have a very particular particle effect which occurs in my level. I have a very large object hit the ground and this then results in a displacement wave of dust, which would come in many forms. firstly there would be the dust plumes

https://youtu.be/sK50So-yYRU?t=28

https://youtu.be/sK50So-yYRU?t=28

when an object crashes down, it sends dust outwards and out, which results in said dust sort of "mushrooming" up. this creates the main shockwave effect, of a growing and shrinking ring of dust explosions.

second, the object falling proceeds to roll. this is going to create a dust trail in its wake, as the ground below the object is displaced.

https://www.youtube.com/watch?v=HSqlEjHVwYg&list=PL8_R6XQMdqJ5YZP639tAhv-ExqNIttCit&index=5


https://www.youtube.com/watch?v=JfL8PtDxOP8

finally, the dust would float in he air, drifting downwards as it attempts to settle.

http://eat3d.com/free/dust_particles