When playing with my latest mushroom shots I ended up with a 100KB .wbm (Wireless Bitmap) in Photoshop. As grayscale JPG it turned out close to 1MB. I found it was possible to save it as PNG. Now I wanted to see whether GR can handle PNGs. Well, it can! At least in Firefox and Safari it shows OK. And yes, this satanic pattern comes from the hood of a local mushroom.