Oh, lenticular printing is amazing, but so expensive even for very basic pieces...
Though since the topic of a 2nd Ed. Silicon Dawn is on my feed, have you considered printing coloured transparent ink over the top of the UV black ink in the VOID suite?
The idea would be to give the sheen that shows the image a different colour than whatever light source is being reflected. Probably a pain to print but it would be a nice touch.
Hmmm! My initial instinct is that adding color to (VOID) is not a thing I want to do, and that's even before I start pondering what it'd do to the cost - the UV-cured spot gloss tends to double the cost when compared to plain CMYK. Interesting idea, though.