[Microbe] Implementing compound and agent clouds

The only input to either curl noise field is a scalar noise function -- ie, they don't affect each other, nothing affects them, the system is not actually dynamic, it just works well enough for our needs since the high-frequency noise is too high-frequency to apply any coherent force to large things, and everything is too small to cause any noticeable effect on the flow of the water. So yes, only concentrations are affected by both grids -- unless we come up with anything else super-tiny that we should treat similarly for prettiness' sake.

Edit:

~scio wrote:

Is the concentration grid global or based on a global grid? (a concentration grid underlying the entire map)

Assuming first global meant to say local: there is no "entire map", the world is functionally infinite, as stuff will get deleted once you go far enough away and will be regenerated, probably differently, if you return. The concentration grid will extend over the entire area that is currently being simulated, which isn't gonna be too inefficient, as I've been looking into ways to make this work quickly.

That's what I wanted to know.