It would be extremely useful after setting up the higher quality render options to window select an area of the full image and the tile mode will only render this area. If I am curious to see how “good” an area I am worried about will look and its in the lower right corner of the overall image I don’t have to wait hours or days for all the other areas to render first before I can see that things are not as hoped and I have to make a few minutes tweak and start again, over and over till I get it right. This zoom idea can show in an minutes what takes many hours to see each time.
Thanks,
Matte