We tend to ignore seeds, or curse them, but we rarely see them. Not in the way that photographer Robert Llewellyn has by unlocking their secrets using software technology called image stacking. From many photos comes one complete image in perfect macro focus. The project, captured in the book “Seeing Seeds” (Timber Press, 2015), also involved more prosaic manipulation. “Sometimes he had to soak, dry, coax, pry, or pin plant bits to expose seeds,” wrote co-author, Teri Dunn Chace.