Charlie in Illinois asks:
I bracket my photos and the white balance of the merged pictures is rarely accurate. I currently don't change the white balance of the RAW files in Lightroom before exporting to Photomatix. Should I? Since each bracketed photo can have a different white balance, I wonder if that's the reason my white balance is off. And no, I don't/won't shoot a flash frame because I shoot many houses in a day and can't take a lot of time on site, and want to avoid Photoshop.
First of all, the HDR process using Photomatix is susceptible to white balance problems, muddy colors, and dirty whites. The LR/Enfuse process is susceptible to these same issues but to a much lesser extent.
The all around best solution for white balance problems when bracketing is to use a single manual flash when shooting brackets. This technique is very simple, takes no extra time when shooting or when post processing, and produces great results. We've done many posts about this technique. Here is one. Nowadays, most real estate photographers that shoot HDR use this technique. There are even flashes that will work with Auto Exposure Bracketing (AEB).