Tim Hawkinson!

And in his cover art for Mutations, Beck featured Tim Hawkinson's sculptures!

In the Tim Hawkinson Encyclopedia by Doug Harvey there's a bit under "B" about Beck and his choice of Hawkinson's work for the album, plus a lot of really interesting stuff if you can put up with the horrible font. Check out "D"(Deleuzian Reversal), "G" (Gender), and "T" (Twinning) if nothing else.

And this is his Emotor. Creepy.