Trevor, I was experimenting with various objects and don't recall exactly which one these were but I believe one was a piece of yellow clay and other was a batter and the third was a red dry-erase market cap. The cap was "sculptured" and that probably gave rise to the texture of the central band. I forget if there was any leaning or such of the objects (BTW, the turnable was a regular one and the photograph was simply turned 90 degrees to make it a horizontal). I had in the past often mentioned one could make pictures like this but generally dismissed them as only having highly specific technical application while mentioning that if what you wanted was patterns this method was one that would generate them. Lately computer geeks have been simulating what a linear array (and before that "streak" and "strip" film cameras) can do and I thought maybe it is time to get into the "frey" with a few more timely decorative images. cheerio, andy >I'm assuming the steeper slope of the black object >indicates it was farther from the turntable axis than >the yellow and red objects, respectively...what i'd >like to know is what the objects are and does the >proximity of the red object to the center have any >impact on its ribbon-like nature (i'm also curious to >know if the red object wasn't exactly perpendicular to >the turntable leading to the wave it produces in the >image)...wicked cool picture