Our Test characters Jack, Zap, Caaro, Fern, and Wong are kindly donated by: Carl-Christian Gehl and are licensed under CC Attribution 4.0 by David Reinhold and Stephen Bester https://www.artstation.com/charactercarl
Concept art for characters by Rohan Yang. https://www.artstation.com/rohanyang
Our Test character Otto is derivative of: "Biped robot" by Willy Decarpentrie is licensed under CC Attribution 4.0 by David Reinhold and Stephen Bester https://sketchfab.com/3d-models/biped-robot-801d2a245e4a4405a0c2152b35b5e486