I've got a client interested in having his poster printed in 3D.
Has anybody ever dealt with this before?
Any tips on how the artwork should be properly treated / created?
Also, are there certain inks that I would need?
(just what this studio needs, more inks...
We've done red/green and red/blue ones. We didn't generate the seps so I'm not sure about the best way to get the two channels in proper perspective. As far as the color goes, you need a pair or glasses to do it. Mix the red until it becomes invisible when looking through the red side of the glasses. Repeat for the other side. Also I think there are already a couple threads about this topic.
I think you'll get a better effect if you don't just shift the entire image - because then everything will be at the same depth.
In Adam's case he used layers in PS to create different planes of depth, this is done by changing the distance between the blue and red. For example, in the background of his poster the red and blue images are closer together then in the foreground images. Look up stereoscopy or stereoscopic 3d for more info!
Here I illustrated each character as a separate layer, made them stereo (one layer cyan, one layer magenta), tweaked one color or the other by skewing/shifting left or right to change their depth. A lot of working on it with glasses on. In other words, it's nice and emphasizes the illusion when you isolate subjects to appear at different depths.
Edit: the grid is essentially useless, just an added level of depth.
You're client should be giving you something he's already prepared in stereo optics. Otherwise you could be spending A LOT of time on it and should charge up a bunch of pre-press fees. Unless simply popping the image off the paper is all that is required.
Regardless, you're going to be researching how to create anaglyphs, stereo optical illusions and stereograms. Time, time, time.