I don't see an obvious option to download all images from Wikipedia Commons. As the post clearly indicates, the text is not the issue here, its the images.
it seems like Wikimedia Foundation has always been protective of the image downloads since the 90s. So many drunken midnight scripters or new urban undergrad CEOs discovers that they can download cool images fairly quickly. AFAIK there has always been some kind of text corpus available in bulk because it is part of the mission of Wikipedia. But the image gallery is big on disk, big bandwidth compared to TEXT, and low hanging target for the uninformed, greedy and etc.
The Wikimedia nonfree image limitations have been a pain in my ass for years.
For those unfamiliar: The images that are marked NonFree must be smaller than 1Megapixel. 1155 X 866. In practice, 1024x768 is around the maximum size.
