The appearance applied to the faces of a part document don't show in the appearance column of the Feature Manager when part is used in Motion Study of assembly. When I change transparency, the part flashes to the part level appearance (default gray), and then starts fading away. It seems the part level appearance is overriding the faces appearance. Does someone know what I can do to have the part fading to transparency without modifying its appearance back to that part appearance (that I did not setup and cannot remove)? Thank you!