The main aspects of both of the designs are not the backgrounds, the client design; is showcasing the login box not the accompanying background. As for the hiscores.info logo; it was showcasing the logo not the background.
On top of that both of those were published on Deviant Art(which is where I found them) under a creative commons license, if an artist doesn't want the art reused he would have disabled the download button on the right hand side.
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[Only registered and activated users can see links. ]





