Yes, maybe we are talking about posterization. All of my evening architectural work is after sunset - but this time it's different, client driven, and I'm not a sunset kind of photographer so this is new to me with digital. In the end I found a file with less exposure shot from the tripod so I was able to fix most of it. But I won't shoot another sunset image without a lot of hdr brackets. I tried to upload a sample photo but couldn't make it happen. The banding I get in skies in arch shots from perspective adjustments will probably be fixed by the fill in darken mode. Thanks to Kim for that, but it didn't really fix this because of the DMax.