Amy and Chris - What we do for this type of scenario with viz is we are setup to have viz load graphics straight to "viz program". This way when a shot is taken in OD and the proceeding line in OD is a viz graphic to be keyed - it loads and plays the graphic as soon as it's PREVIEWED in OD. It was a bit weird getting use to this setup, but once accustomed to it, it proved to work very well.
Amy - an alternate option that you could take (depending on the OD version), is to make a transition that is a CC. The CC that would become a transition would have the element that clears your viz channel, a short delay, then a cut on the switcher (to take your next line in OD). This route would clear up the problem of if the line in OD was dropped you wouldn't take the wrong thing next, as you discussed.
Chris - your setup with an example of a pause and resume with Xpression is a great idea, and good to know. We haven't needed to go that route with viz, as the force to program has been quick enough and we don't have a need for viz preview.
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