Forum:SH:Can http://fractalsponge.net/ be used as a legens source for pictures of space ships

I have seen other users post images from http://fractalsponge.net/ in Wookieepedia articles (ex:http://starwars.wikia.com/wiki/File:Vigil-class_corvette_%28Fractalsponge%29.jpg) and only use the website link as the source. I was wondering if this okay because when I did it my picture was deleted. I don't see why the website couldn't be a legitimate source since Ansel Hsiao is an illustrator in several official books and articles, and other star wars websites qualify as sources.