this might help, when i bring a bryce background i render to disk at 300 dpi - for example if i wanted a 13x19 print i would use bryce to render to disk 300 dpi at 19 inches x 13 inches. that is the file i bring into poser. when all else fails, i load it photoshop englarge the image to view pixels plus another 20%. select the smudge tool set to 22% with very small brush setting and gently go over the edge of moon - works very well. Hope this helps