I have tradeshow booth (8' x 10') I've designed using Illustrator (layout) and Photoshop (imagery). When they get the artwork, and do whatever it is they need to do, the CMYK white isn't displaying. Anyone have any ideas? Do I need to give the white a color of 1% K? The example below is the profile cut or top section that actually is separate from the booth, but you'll get the idea. Left is their proof, right is my artwork.