tool cover art?

I have an art project that required us to research an artist. i really want to do the artist that paints alot of the stuff for tool, such as the lateralus cover. ive searched the internet but for some reason i cant find out who it is. Id really appreciate it if you would help me out.

 

Alex Grey does some of their covers

 

^^he did most of Lateralus and quite a bit of 10,000 Days art

Check out http://toolshed.down.net/

 

Allright. Thanks alot for your help.

 

yeahh, its alex grey who did the most recent one. i'm not sure about past albums, though.
he's an amazing artist. very trippy stuff.