Here's a segment on the actress' sessions with Milton Greene
Just before the two minute mark we're shown photos from the "Black Velvet" sitting.
Ordinarily, this would be motion graphics -panning and scanning over photos. Not here. The photos were tacked onto a wall and filmed with a handheld Super 8 camera.
The result is loose and sensuous. The camera moves over the images just as your eye might, going in and out of focus- staring, moving with fits and starts.