In the summer issue volume 8, edition #12, of E F X Art & design. page 59. The image is called Pixalrift. It looks like many blocks arrayed in such a fashion as to form a sort of valley. To try and duplicate this, I followed the authors very small tut by creating a 3 x 3 pixel image, applied a diagnal gradient from black to white, resized my image to 1024 x 1024(Bryce terrain size), then scale transformed my 3 x 3 pixel image to cover my image size. I then applied a twirl filter to this. So far all Ok. I go into Bryce, bring my image into the terrain editor. Create my terrain and render. Problem Bryce wants to see sharp white between the pixels and create spikes so to speak. well I managed to include a picture without locking up my comp.