Houdini. Mantra (pbr for smoke beauty pass + raytrace/mp for ground dust and additional passes - shadows, fire, fire reflect etc.)
several medium grids. ~300 gb of different caches, pyro + some extensions, simple shaders.
EDIT: darkened it a bit. thanks for suggestions.
Loading more stuff…
Hmm…it looks like things are taking a while to load. Try again?