Originally Posted by
Marty Postma
Of course using Mixes is the ideal way to go....as long as you have a full PRO version server this should work well....otherwise you will run out of available Mixes fast.
So in this case, set up 6 Mixes, 2 per "output" of the Triple head that cover the entire raster of their respective "output", and then you can use the Mix Shape Control to adjust them to fit the set pieces.
If, for some reason, you need more than 8 Mixes at once to do this, you will get in to trouble, and have to use some of the steps I listed initially.