On 2015-12-06 17:16, Chris Clepper wrote:
One use for [separator] is to texture the same image or video to multiple surfaces.
you *can* do this with multiple gemheads as well (though it requires explicitness, whereas [separator] just does it for you)
Another is to control the center position of multiple geos that are offset from that center.
i see [separator] as a way to *group* geos. if you ever want to apply a single transformation to all geos in the group (though probably not all geos in the world), [separator] is the way to go. (this is just a more generic way of saying what chris said.)
my usual example is a "hand": you can move the fingers (somewhat) independently, but if you move the entire hand the fingers will move along; hence they form a "unit" and i use [separator]. conversely, two "people" can move totally independently, so i'd use multiple gemheads...unless i'm modelling a star system, were humans and midgets are sub-elements of entire planets.
as for overhead: start worrying about that once you do hit a performance boundary, not before.
fgmasdr IOhannes