Hi Jock - Fuji-san got rendered to 4000x6000 for a 20"x30" canvas print. I had the misfortune of deciding the "mountain" looked "perfect" with a value set for a z-dist  variable that  made the layer calculate 40000 times for each of 9 or 10 separate loops within the formula - times the number of iterations to whatever bailout I had. Or so it was explained to me. I really didn't notice it was all THAT slow when I rendered it whatever by 768 - just another "overnighter" started late. I'd used that mountain before in a seascape thing I called Vancouver Sunset that was one of the first things I ever posted here or anywhere and it had LOTS of what I thought were "rendering errors" that I spent days painting out with PSP. Weird streaks and jaggedness in the "snow". That one was only 1024x768 for wallpaper and there was nothing over the mountains that would have made it undoable. Fuji-san is a whole 'nother animal and it wasn't something I even pondered trying to do. So I messed with the formula and finally hit on the "right" setting that was actaully just the "wrong" setting if you wanted to render a decent sized copy in something a good bit less than forever - lol. Which segues all the way back, sorta, to Mindy's original post in this thread about things taking a long time. Am I good or what? lol :-)

Rick