Hi Russ, It may be that your shutter speed was too slow and allowed lights other than your strobes to "help" with the exposure. Mixed lighting is a very common problem with lower powered strobes used on location. If your shutter speed was in the neighborhood of 1/30 sec or so it is quite possible that ambient stage or area lighting caused the shift you need to use as fast a shutter speed that you can to make sure that this does not happen but at the same time allow for your background to keep the density you want. Give a test a go and see if 125th a sec has a lower color problem. There are of course other problems that may be the issue, color shift of the heads or your softboxes are not quite white. It could also be the age or type of flash tube in your strobes. Just a quick thought was your backgrounds white? If so than it is probably mixed light from another source. Also was the subjects wearing photo make-up or stage? Those do have an effect as well. I hope this helps, Les Baldwin Good stuff snipped Even though I didn't change the lighting scheme or exposures, on many of the shots the flesh tones shifted from normal to a bit cyan.