Either when you use an emitter or inflow, particles will only spawn in the positive XYZ values.
But when the particles are simulating they can move into the negative values without a problem.
There also seems to be a margin. If you change the resolution or size of the MPM solver node the margin size changes.
Either when you use an emitter or inflow, particles will only spawn in the positive XYZ values. But when the particles are simulating they can move into the negative values without a problem.
There also seems to be a margin. If you change the resolution or size of the MPM solver node the margin size changes.