Unless I'm mistaken, you can apply a cutscene invisibility effect on the placeable and remove it later via scripting.
Seems like I recall that SunJammer created a series of identical placeables with that effect and removed the effect in quick order to create the illusion of "moving placeables" in one of his library of functions.
Hopefully, I got the link right:
www.sunjammer.co.uk/
Modifié par Blasco-Yang, 03 août 2010 - 12:31 .