I just got some 4x5s back from a recent trip to the Bisti Badlands. I made one exposure about thirty minutes after sunset- 3minutes @ f22 on RVP. It was, literally as well as figuratively, a "shot in the dark". When I got the film back, I was surprized that it was my favorite one- the lack of shadows and ultra-low contrast give a surreal effect, very appropriate for the Bisti. Also, I didn't notice the sickly green glow I've seen on Velvia when exposed for 20 or 30 seconds! Does anyone have any experience with exposing RVP for multiple minutes- does the green color shift go down with longer exposures? Thanks!