I understand that, but emitter's are tied to volumes, so it's easy to calculate radius in world space, whereas simulations are volume independent, so their radius values are in pixel space. I could add an output to the volume editor, showing you the world space size of the emitter etc... But I would like to keep it world space as it's consistent with unity colliders, and other similar components. As for handles, you should be able to rotate temp emitters to change their direction. I will add an extra transform to represent the simulation direction/position. Thanks, for reviewing! Offer's still on the table, if anyone else wants to leave an honest review, I will forward you a token of my appreciation.