Will be released in the next 4 weeks. It was fun to make, but also quite nightmarish in the technical details. It is a hell of work (we have roughly 30 animations in the book, very small and very big ones). It requires extremely accurate measurements for the grid-foil and a sophisticated workflow and color management.
In the first run, the printer forgot to fixate the ink on the grid-foils with a protective layer, so using the foil would smear the black color.
I had this as well and was fascinated by it as a youngster. Seeing this site today brought those memories to the surface in a rush of nostalgia. This link in the comments was icing on the cake, thanks!
Isn't this how those "3D" panels work as well? It's the same thing printed, but with a plastic prism-esque thing on top showing different views from different angles.
Most 3D panels use an array of lenticular lenses to convert incident angle to position[1].
Note that the 3DS actually uses a parallax barrier, which is similar to this, but with the stripes far enough out-of-plane to the image to allow each eye to see a different part of the image[2].
The book my daughter has works just like this website, with black stripes on a transparent layer, and a layer immediatly below that is attached to the spine, but not the outer layer, causing it to move relative to the stripes as the page is turned[3].
The book has been printed and is currently delivered to stores and Amazon. The Amazon-link above will come up with previews in the next couple of days. The effects are quite stunning.
http://www.amazon.de/Ulff-Backenh%C3%B6rnchen-eine-irre-Verf...
Will be released in the next 4 weeks. It was fun to make, but also quite nightmarish in the technical details. It is a hell of work (we have roughly 30 animations in the book, very small and very big ones). It requires extremely accurate measurements for the grid-foil and a sophisticated workflow and color management.
In the first run, the printer forgot to fixate the ink on the grid-foils with a protective layer, so using the foil would smear the black color.