Just for kicks, try out the Polar Coordinates filter: Make a new document with the width and depth the same and a white background. About a third of the way down, draw a horizontal line across the image. Now apply the Polar Coordinates filter using "Rectangular to Polar". You should end up with a circle centered perfectly in the document. This may not seem like much, but it can be used for all kinds of special effects. For instance, before applying the P.C. filter, apply a wave filter with 1 sinewave generator and a wavelength which divides equally into the width of your document (i.e., if your doc is 256 pixels wide, use 32 as your wavelength) amplitude set to the same as your wavelength and horizontal amount set to 0% with vertical set to 100%. This should result in a wave which tiles perfectly horizontally. Apply your P.C. filter and you get a wavy starburst. I have used this filter to make Celtic knotwork tattoos from straight sections of Celtic braid. You can take anything in a straight line and make it curve around into a circle. I think this is the least appreciated filter in the whole Photoshop package. Your thoughts?