Thought I would join this comp. Firsty I want to try and keep away from the cookiecutter mushroom cloud (really big dome cloud) and go for a smaller yet very turbulent effect.
Uniform sampling of the Voxel grid: 200 samples
Standard shading at the moment
No point clouds created yet for inner lighting of the fluids
A slightly larger mushroom head
Resizing of the voxel container to stop fluid clipping on the sides.
Creation of the floor fluids
Creation of the dynamic clouds (as the head bursts though the upper atmo)
Creation of the pre-cursor (very strong dynamics winds)
Creation of buildings
Shattering of buildings to be copied onto particles to be "blown away"
Also flipbook of sim at the moment (before tweaking)