Since a few people have requested it, I’m posting a rough guide to the technique I used to make my Vriska arm. I mostly made things up as I went along, but I’ve saved the pieces of my prototype.
I started by making rough shapes out of oak tag, taping them to my arm, and tracing out what should or should not overlap, etc. I messed around for a few hours until I had something that fit well and didn’t limit my range of motion too much. I then disassembled it and flattened the pieces for tracing.
Part II incoming.