Hi Anton. The problems I am describing are not even close to being solvable by WB or color temp. First, color temp is only a one dimensional shift, along the black body curve. WB are discrete settings that either match what you want, or not. In the software I use, I have a color wheel, which allows me to shift to red, green, or blue, or their compliments (correct term?), cyan, yellow, and magenta. The following are not fixable by any of your recommendations: reflections from colored walls in a room, the deliberate use of colored lights to bring out the colors of some flowers or other objects, pictures taken in a greenhouse with exagerated green from reflections off of plants, or blue from light passing thru plastic sheeting and shadecloth, a sunset illuminated scene, where yellow is in extreme abundance (
http://www.pbase.com/schnitz/image/35336829/large , where the image is still yellow after a very exagerated lowering of yellow). Even shade can be different colors depending on what kind of reflected light is influencing it and the time of day, as shade WB adds yellow to compensate for the blue of the skyglow which is most of the illumination, but the sky is not always the same shade of blue. In Los Angeles, often the sky isn't blue at all. I am now in the habbit of taking all pics in daylight WB, and converting the color if I feel a need. Cynthia