Actually, in this case it starts with an arrangement on my light box, and eight high-key HDR exposures recombined in Photoshop. The resulting image is shown immediately below.
An LAB L-Channel inversion puts the image on a black background, like so:
From here, it was time to play with post-production, using rotations, horizontal and vertical reversals, a variety of Photoshop blending modes, and more LAB processing. Which variation do you like best?