This is a 5(or 7, can't remember) exposure, .7EV spacing done in Photomatix. I had a print delivered from Smugmug and the underside of the bridge is just a pile of noise. It's the worst closer to the rocks where there was less light. From a distance you can't see it but I eyeball my prints and this looks horrible to me. Is there a technique specific to HDR photography that helps reduce noise in shadows? Would it be better to take fewer exposures, such as 3 with 1EV spacing? ISO was low, 200 or 400 so I am not sure if that caused this or not.