When designing the back, I really wanted to get some high level of detail without resorting using any colour. The design is entirely hand drawn (iPad), I then transfer it to photoshop for touch ups here and there and finally to illustrator to create the print ready file, which is set to the USPCC's printing specifications. I have had pretty good results using Adobe dimension for my renders but if I could Id like to learn something like Cinema 4D (very expensive!).
