Tilt the card one way and you get this view.
Turn it the other way to see this.
Straight on the card looks like this.
In the strictest sense, by the way, this is not a true lenticular image but a lenticular effect, as there is no lenticular lens involved.
This is my second try. My first card was two shots of waves splashing against rocks. It didn't work at all.
I learned several things about photo choices for lenticular cards. First, the two photos should not have similar tones--that is, one should be relatively light and one should be relatively dark. Second, do not pick photos with strong horizontal lines.
Scenery pictures with a horizon don't work very well. When you look at the card the horizon stair-steps in a disconcerting way. There was an unexpected horizontal line in my boat picture. See how the water line on the ferry gets wonky unless you're holding the card at just the right angle?
So, that's just a teaser. Go dig through your pictures for some likely candidates and come back in a couple days for the tutorial.
Extreme Cards and Papercrafting: pop up cards, movable and mechanical cards, digital crafts and unusual papercrafts.