Update - 12 Jan 2021
Well, yes...more hexagons.
I guess I'm a little chaotic. I try to organise myself.
Update - 29 Dec 2020
After some tests with only grains, I realized that that was not what I looked for. I needed references. Above all, the appearance of a rocky desert, and how it breaks. Some videos of industrial explosives works fine for this.
The RBD sim takes care of to emit the particles for grains simulation.
To interact with Grains sim, I cached the RBD sim in VDB format.
And here is the final result.
Update - 17 Dec 2020
Before continue adding entries, I think I should explain where this project is going. I'm going to get as close as possible to one of the 3 concepts provided, in principle we should adjust to a production environment.
WARNING: I have never worked in VFX. The steps I detail below are probably not the right ones. This is my vision of how it can be done, nothing else.