I should have run more tests, PNG isn't so hot on compression in most images or textures. Sorry about the file size, but the sample hopefully will show the artifacts even a high (quality 8) JPEG has (on the right) compared to a PNG, I saved this as a quality 11 JPEG, to show the difference. Quality is good, but filesize isn't- the JPEG (this is only a part, and I double-sized the part) is 44k, the PNG is 260, not so good. A LZW compressed TIFF is only 288k, and as the TIF doesn't degrade the image at all, and everybody can use it, I'll stick with the later when I want to ship max quailty maps, as I did with the trans map on the Hollywwod hair set (at least I think I did, anyway!) So, forget PNG!