Cell size, metres. Fixed at construction.
Seconds for a wet surface without standing water to dry (e-folding).
Evaporation, mm/h.
How fast water runs off and levels out, m/s (a sheet-flow speed: one cell per cellSize / flowSpeed seconds).
Water soaking into the ground, mm/h.
World x, z of the field's minimum corner (cell (i, k) is centred at origin + (i + ½, k + ½)·cellSize).
Cells along x and z. Fixed at construction.
Seconds for a dry surface to get wet under rain (e-folding).
Settings of a PuddleField. Plain JSON.