If there are sprites which are attached to this clip region, they will be let out and the clip region is freed immediately.
The behaviour for layers is different: If there are layers which reference
this clip region, then Hollywood will keep the clip region until these
layers are gone. As soon as there are no more layers which reference this
clip region, the Hollywood garbage collector will free the clip region
automatically if you have previously called
FreeClipRegion() on it.
Please see also the documentation of CreateClipRegion() for more information on clip regions.