I recently learned on ‘Stuck in Customs’ (Trey Ratcliff), that you can tone map a single image in Photomatix. I’ve tried this on several images, and like the result. It really came in handy for some shots I took in Grand Teton where I forgot my tripod. But I did notice that in pictures with a large Dynamic Range the single image version is a little more blocked up then a 3 image file. Makes sense. I guess nothing is free. See if you can tell which is the single image.