Quoted from MustangPaul:
You do great work. I'd like to someday see how that's done, I know it takes hundreds of hours of computer work but I like that kind of stuff.
It's basically layer by layer. You start with all the black contours and then „fill“ those with the colors. The problem though is that filling doesn't work like the paint bucket tool in Photoshop, as a) the paths aren’t necessarily closed and b) the color need to underlap the black contours, so in case the color layer gets slightly misregistered in printing (shifted) that you don't immediately see a white gap.
And then there is a lot of guess work involved, as the scanned source playfield is often already printed with huge misregistrations. In case of the High Speed I had to contact Steve Ritchie (the lead designer) in order to figure out how to get in contact with Mark Sprenger, who back in 1985 drew the original High Speed PF artwork and who luckily answered me quite some few questions on certain details.
I've posted some images of the Illustrator artwork here: http://pinside.com/pinball/forum/topic/anyone-know-when-cpr-will-be-finishing-high-speed-playfield#post-952977
Attached is what this looks like as wireframe in Illustrator (you gotta zoom in, 180,000 vector points in total). But while this might look impressive, one shouldn’t forget that Mark Sprenger did this back in 1985 all by hand, which I think is much harder.
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