The names now listed at the bottom of the lineup poster and some of their art
Robert Bose
The Do Lab
Charles Gadeken
Charles has a ton of great stuff that can be found here. Links of artwork on the right side of the page
http://www.charlesgadeken.com/art
The Jive Joint
Don Kennell
James Peterson
Poetic Kinetics
Abby Portner
Raices Cultura
Christian Ristow
Shrine
Phillip K Smith III
Stereo Bot
Vimeo videos don't show up on all phones, so here's a YT vid
Studio Steel
I couldn't find anything to match this. I typed in 'Studio Steel Coachella' and a bunch of other artist's work popped up.
Coachella Art Studios