Per channel: 1 = the channel persists and is advected (semi-Lagrangian) by wind + rise each
resolve, decaying at decay, and splats are rates (added × dt); 0 = the channel is just this
frame's splats (e.g. density).
Per channel exponential decay of advected values, 1/s.
Minimum corner, local space of the systems that use it, metres.
Cells along x, y, z. Changing it rebuilds the buffers.
Advection velocity: extra updraft, m/s.
Extent, metres.
Advection velocity: air wind, m/s.
Settings of a ParticleGrid. Plain JSON.