Have been looking at a couple of the new features in v.6. There is now an option to paint in colour adjustments with a brush within each colour channel. Seems to work very well. Another new feature is an option to merge into the Tonemapped image one of the original bracketed images that will adjust the exposure/brightness levels. Not sure how valuable that will be as there are plenty of other means to do that both within Photomatix and in the host program you use.