I just took a look at some of your cards on Thingiverse. Each one had an image of one of your 3D pieces with nothing more. For Game Courier, it may be appropriate to use cards with a 2D image matching the piece set used, include the name of the piece, and maybe a short description of how it moves, even if just in Betza code. Also, this may be doable with a script, which would avoid the need to draw each card by hand. I could even write a script that draws a card on demand from certain query parameters, which might give you more flexibility in creating decks of cards.
I just took a look at some of your cards on Thingiverse. Each one had an image of one of your 3D pieces with nothing more. For Game Courier, it may be appropriate to use cards with a 2D image matching the piece set used, include the name of the piece, and maybe a short description of how it moves, even if just in Betza code. Also, this may be doable with a script, which would avoid the need to draw each card by hand. I could even write a script that draws a card on demand from certain query parameters, which might give you more flexibility in creating decks of cards.