On 26 Jan, 21:43, "Bramble-Stick" wrote:
"Bruce" wrote in message

...

"Bramble-Stick" wrote:
Does anyone know ho these cheesey moving waterfall pictures work?
e.ghttp://www.moving-waterfall-pictures.com/

Does anyone know who would possess the complete lack of taste needed to
buy such things?

I have only seen them in ethnic takeaways and restaurants, and mostly
back in the 1970s.

Absolutely agree - I wouldn't part with money for one. Just interested in
how they work, so that I can see if I can build one. At least it will be a
DIY taste fail - I'm of the Readers Digest Manual and Alternative London
school of DIY so taste is compromised anyway :-)

Bramblestick

Look up Moire pattern like

http://uk.youtube.com/watch?v=lqSVUYWoabY

HTH
Adam