How would I 3D to get this drawing to pep, or would it look better as a one piece chest and back, and how would i do that. Here are some sketches that i came up with. the chest piece will be reversed for the other side.
i have no idea how to model stuff to be unfolded in pep.
what you could do though is old school it.
experiment with some poster paper or card stock and mock up the plates. then after you have something you are happy with, use those as your templates and make the armor out of foam or cardboard. you could then coat those with resin if you wanted hard armor.
I would personally use posterboard first, and then if you are happy with it transfer to foam. Foam is cheap enough, but it adds up quickly. Isn't worth wasting for a design you decide you aren't happy with in the end.