Emitter nodes generate the colour/ink that can be manipulated in a field system. Any Emitters need to be connected to a Field Root node, and they will only spawn a field within that field system (unless modified appropriately).
Emitters constantly emit new ink into the field, and the ink already in the field decays over time based on the “Colour Fade” property in the Field Root. These need to be balanced to ensure that the field does not overflow with ink - e.g. by increasing the colour fade, by reducing the emitter amounts or by cropping the time bars of the emitters so they only emit at certain times.
Emits ink into a field based on an input Mesh.
Emits ink into a field from another input field.
Emits ink into a field from an input image.
Emits ink into a field from particles.
Emits ink into a field using a primitive shape.
Emits ink into a field from procedurals.
Generates a reaction-diffusion simulation for a field.