There was a website dedicated to Rob Leifeld and showed how he swiped stuff from other artists and used a lightbox for a lot of his stuff. (Well, there were other art thiefs, but he had close to 3/4 of the site to himself)
It's gone now, but it was very interesting and funny seeing just what Liefeld stole from. I think the most famous was for Re: Gex and it was a swipe of a Bubbegum Crisis promo picture.
Maybe you were speaking of this image?