How can I create a creaing rule as perforation line. What color name? So people can peel open a piece of paper. Or should I just create one myself just for print and uv map look.
Origami does not support perforation lines (yet). There was an idea about this somewhere here, please feel free to upvote it to increase its priority.
Meanwhile you can do it at artwork layer.
We've created perforations manually by alternating cut/crease lines (in illustrator you can make your dashed line, expand appearance etc.) we make the perforations a rectangle cut gap (just a tiny one) and the crease between their centers, the resulting DAE we get comes out nice.
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