The Game Crafter makes its own plastic game pieces using a 3D print farm. The parts made on the farm are to supply stock components to our parts catalog. At some point in the future we may also open it up to make custom parts for your games, but we do not offer that at this point except through Laboratory. Though you can’t make parts specifically for your game, if you would like to contribute models to The Game Crafter’s parts catalog, we do accept model donations. However, they must conform to some rules.
Learn more at:
https://help.thegamecrafter.com/article/509-designing-for-3d-printing
Keep in mind that these things are not for "you". They are for you to contribute so that anyone, including you, might be able to use them as well. Which means that if you are submitting a polka dotted giraffe with a bunny head we're likely going to reject it as too specific.
Likewise, we're generally not interested in multi-part pieces that cannot be used on their own, though we may make exceptions for that.
In general you shouldn't go more than 50mm in the Z direction, but exceptions can be made if the piece is useful enough to a lot of people.
I hope that helps. If you have other questions please let us know. Happy to answer any and all questions.