Programs like Sony Vegas /final cut/premiere pro all these top of the line programs are able to have a option to show or dont show the preview window of the video being rendered
Once the preview is not turned on it will render the video faster would love to have that in a future topaz update
I have found that minimising the program improves the performance, presumably because a minimised window does not need to be updated and so the preview is not being drawn.
that is true but the video is still playing even though its minimized
I mean the video not playing at all while rendering it will speed up the process