There is no way to show how cool these look in person, but I tried with a video!
 
This image is a black photo I shot on film in Big Bend Ranch State Park, Texas while on a camping trip. The graphic nature of the simple subject with the white skull and deep shadows makes for a great lenticular flip! To really see the change, you need to watch the video. Still photos of it are a bit confusing since they don't show the solid positive or negative. They're kinetic in nature so you experience them by movement. They're not really meant to be seen in a static viewing!
 
This is a 5x5" lenticular created using my photography. I made the images to flip from positive to negative when moving side to side to view them. Mounted on 5x5" wood cradle frames, painted black, they are lightweight and hang using a sawtooth hanger. 
 
But what is a lenticular? In photography, it's something you might have seen as a kid- an image of a cartoon that changes to something else. The plastic ridges across the image are part of the technology of this optic illusion. But lenticulars have been around since the 17th century- in art- called tabula scalata, or staircase painting. Made on wood, painted to flip from one scene to another. Then revised in the 30s and 40s using photography for advertisement, picked up by artists using both photography and three dimensional lenticular methods (Agamograph- named for the kinetic artist Yaacov Agam). So it's been around- and just like my kid self looking at little lenticulars that came in candy packages and being transfixed, I lose myself in these current works and hope you will too!