I've been battling with my HDR pics for months now since I purchased a Canon 40D. Every time I convert the RAW file to an HDR, and then try to do tone mapping with photomatix, the picture is exceptionally noisy. No matter what I do, the pictures I try to do with the 40D in photomatix are noisy. I've even tried auto bracketed photos, but to no avail. Does anyone have any idea what might be causing this? I thought it might be the settings on photomatix, so I uninstalled it completely, and reinstalled it with the same outcome. These pictures look as if someone has put ISO 1600 on a cheap 2MP camera or something, that's how bad the noise is. Maybe someone has had this issue with photomatix, or even this camera. I'm completely lost and I'm about ready to give up. It should be noted that I even tried grabbing the sample pics from hdrsoft.com and testing with those, and it works just fine. I also tried with pictures I took from the past on a different camera, and it works just fine, which leads me to believe it is the camera that is causing the issues. Only thing is, every picture I take normally looks fantastic with no noise, so I don't know where the noise is coming from.