I noticed that if i call Stop() on a PlayableDirector it seems set the graph to Null, and i assume its been disposed as the output .IsOutputValid() becomes false. Are they supposed to get rebuilt every time Play()/Stop() is cycled? In my case i am re-configuring an output with a mixer for blending and so having to rebuild and redo all that work every time stop is called seems like a bad idea. The better option, particularly if they're heavily re-used seems to be to call Pause() and then set the time back to 0 manually before hitting play() again. Are there any consequences to either approach we should know about?