On another thread someone was asking why Vegas was rendering slowly when there were multiple video tracks with video events but only the top one was being used.
From this webinar the answer is because Vegas is going from the bottom track up with the compositing. So yes, Vegas does look at the lower tracks while rendering even though the top one is the only one visible.
So it is best to delete unused events/tracks to speed up rendering.
I know many of you are way beyond needing this, but as it went buy kind of quickly, this is where to go until Jan 31, 2012 to get the training video @ 20% off, that Gary mentioned during the webinar.
I ordered the Vegas Digital Video & Audio Production @ 20% off, mentioned during the webinar Wednesday and received it today. Order processed and shipped within 24 hrs, can't get much better than that.