ok, this is making me zoo-zoo

At first glance, I don’t see many shortcuts to create this image with emboss/lighting effects. There are 66 lighting directions; one for each "saw tooth".

If you look closely, each tooth is identical in shape, rotational orientation, and highlight direction. The difference between teeth is a polar movement of 10 degrees on the outer ring and 12 degrees on the inner ring. You may have to create 66 layers and rotate each one.

"Mild Thing" wrote in message

I know I’ve done this sort of thing before, but can’t quite get it today. I assume there is some emboss and polar coordination involved, possibly some layer styles, but how does one get this effect? http://www.optillusions.com/dp/files/1-26.gif
TIA
mt

On Sun, 02 Nov 2003 16:02:36 -0700, Mild Thing
wrote:

I know I’ve done this sort of thing before, but can’t quite get it today. I assume there is some emboss and polar coordination involved, possibly some layer styles, but how does one get this effect? http://www.optillusions.com/dp/files/1-26.gif
TIA
mt

That particular image is a very well-known optical illusion.

My bet is that if you wanted to recreate it the first step would be to create a line drawing in Illustrator.

I think you’re right about the emboss filter having been run in PS. But note that the highlights and shadows are on different sides in the inner circle than they are in the outer circle. So one click of the filter on the entire image is not going to accomplish the final effect.

— JC