I photographed these Iris using a black velvet background and sunlight enhanced with reflectors and gobos. To make the image, I shot six exposures with my 85mm perspective-correcting macro set to f/64. Shutter speeds ranged from 1/30 of a second (for the black background) to 3 seconds, all at ISO 100.
In Photoshop, I layered the exposures with masks, using Overlay and Soft Light Blending Modes where these enhanced the texture in the Iris petals.
Related image: White Iris.