Altrough it’s probably more or less feasible with cascade simulation (didn’t test it for now), I thought about some kind of UpRes Cage in the Grid.
I’m thinking typically about an ocean simulation where you could have a zone (or zones! even better), where you have an up on the cell resolution. Typical example, I’m thinking of, is a ship: It’s better to have a good cell resolution at bow, when we could have less cells on the rest of the grid. So, it would be like a box or a sphere, which is in the main grid, and in this Gizmo, you can define an UpRes of 10%, 25%, 50%. Once the particles leave this “Gizmo” they are “melted” into the main grid resolution.
Does this make any sense to you?