Today we’re making available an enhancement to ProPhoto’s image downsizing functionality. ProPhoto build #204 adds support for an alternative image downsizing module, called “ImageMagick”. The bottom line is that ImageMagick is faster and results in better quality downsized images than the default “GD” module.
However because this functionality can effect every image on your site, we’ve released it as an experimental feature that is turned off by default. It is also possible that your webhosting company doesn’t provide this module on your server. If you are on build #204 or later, and want to use ImageMagick, see the instructions here:
If you are running a build below #204 and would like to use this new feature, you can force your site to auto-update by going to “ProPhoto” > “Customize” > “Site Settings” > “Misc.” > “ProPhoto Updates”.