If the answer from Steemit and crypto community experts is, "no part of it," will you be accepting of that answer?
Because no part of this is really suitable for an open public ledger. In particular for 3D models, which can be modified and edited in all sorts of ways which are largely physically indistinguishable but can be vastly different in terms of the actual geometric description.
Without the ability to create a reasonable abstract description of a particular 3D file, which is effectively an indelible ID, there is nothing reasonable to log in a public ledger and thus there is no way to control it as intellectual property.
RE: How are intellectual property issues solved with blockchain? (Practical discussion)