Adding to the post from Alan, for people who may not have heard about Genuine Fractals or STN files...
The STN format is proprietary and is not pixel based. One opens the STN file into the GF plug or using a QuarkXpress xtension. In the case of the image editor plug - the STN file can be 'rendered' out to pixels of any size/resolution (as the data is resolution independent fractal data).
GF is used for two things - image compression and fractal interpolation (invention) of pixels. Although the web can benefit from small file sizes, I do not know of any GF based web viewing. I don't think GF is suited to the web, although it could render out a small image - it is usually purchased for its ability to resize large amounts of pixels with supposed better results than other methods.
More on resolution and fractals can be found at my links page - shortcut link below:
http://members.ozemail.com.au/~binar...V_links.html#R
Regards,
Stephen Marsh.