I took a bunch more pics today with better results than last week, but it's a challenging shoot for sure. I'm amazed how much better my eye can detect the gradient than any of my cameras, regardless of lighting. I'm resigned that I will lose 2-4 layers out of the 11 that I poured. My best luck so far is in a light box, at least for getting the color right if not also the gradations. But it has shortcomings too.
My favorites from last weekend were shot outside with a snowy background. I loved the effect but just couldn't get the white balance right, which really affected the color. I might post them elsewhere afterward because I like them even though the colors aren't true.
Love this technique and have made a couple outside the rules just to explore. Funny, I was never drawn to gradient soaps before. Maybe that's because the pictures suck, haha!