You can use any object with this emitter to fill it or create particles on its surface. Changes on position, rotation, or scale do not affect this emitter, because the creation of particles depends on the object you want to fill with particles. Objects meant to be filled require a → Volume" tag. For more information about on filling objects please go to → "Filling Objects".
...
The effect of this option is based on an object's → "Volume Mode" settings. For more information about on filling objects go to → "Filling Objects":
...