First: I'm not 100% sure I selected the right forum for this question, if need be, please move it to the correct forum. I "discovered" HDR a few months ago and have been fooling around with the technique trying to learn what works and what doesn't. I often like the way HDR makes colors pop and how you can use it when exposure values in an image are widely apart. What I don't like so much is how often the image appears to have far more noise and also how often the skies in an HDR image end up dull and almost "dirty". I would really like to understand this technique better, know when it's likely to work and when it is probably a mistake. I've read a number of online articles, but still feel a bit confused and unsure. On the advice of a "pro user", I'm using Photomatix Pro to process my HDR images. Can someone steer me toward an online or hard copy source for more detailed information on the best use of HDR and how to master the various techniques. I'm attaching 2 imges I processed as HDR for possible clues as to why I'm stumbling with this technique. Thanks for any input and direction.