About Zebra, I think people might be on the right track with it being a mosaic of some kind, but the name “zebra” seems to imply something, perhaps in a “is a zebra black with white stripes or white with black stripes”-Type situation. Perhaps the line is more akin to lenticular printing, using cheese slopes to create two different images from two different perspectives? So instead of a single mosaic of Iron Man, it might be split between both him and Captain America.