Hi Tony,
I just want to make sure I understand what’s going on. You have a Vegas timeline with three video tracks. Topmost is the video clip with an FX 9 filter applied to it that you rotoscoped, next down is a graphic element with alpha channel, and below that is Vegas solid color (white then black after client revision).
If that’s the case, I can’t reproduce what you’re seeing. My effect still renders correctly set to Premultiplied Black. Am I missing something?
And the updating preview issue refers to the video preview in FX when used as a filter. You will only get one frame of host video from Vegas due to plugin limitations.
Thanks,
Dave