For some sites, PSD support would be useful... actually it'd be useful for some Wikimedia stuff since our designers like PhotoShop, though the proprietary file format is 'not cool'. :)
In theory, ImageMagick has some PSD support and may be able to do this, but I don't know how reliable it is.
Version: unspecified
Severity: enhancement
URL: https://www.mediawiki.org/w/index.php?title=Project:Support_desk&offset=20130901112101#Does_mediawiki_support_PSD_thumbnail.3F_32651