"Render Region in the walkabout window.
It dosen't work the same as it did back in the AR3 days. Used to be, if you needed to fix something after a render, you could and just redo a portion and overlay it in photoshop. With the way…"
Actually I always render in Nxt - Exteriors are really fast both on my old Quadcore as well as the Dell supermachine. Its all about the resolution size for me.
Of course interiors need a lot of study before setting render times."