We need game model because our main segment will be gamers, and the idea is to let them print their favorite characters, weapons etc
Excellent - THAT is the kind of info we need to provide better advice.
In my mind, the process will have to be something like this:
- You find developers that want to participate and negotiate a contact.
- Their artists do all the work to create printable 3D models for you. You tell them what kind of rules to follow when making their high-quality models. If you don't know what kind of restrictions you need yet, you need to figure that out beforehand.
- You provide the printing service and marketplace for players to purchase the final printed product.
- You pay a cut of the profits to the developers.