Good luck with the additive.
So you use materials that cause a 3D scan to get (slightly) corrupted, essentially introducing 3D DRM.
Solution is to make multiple scans using different devices, compare the various scans, & discard the data that doesn't exist in all of them. You're left with a single scan data file that contains none of the corruptions, allowing you to print off the original with ease.
Anything you (in this case the fuckers at Disney) can do hackers can do quicker, cheaper, & ultimately better.
So good luck with your attempts at pseudo-3D-DRM, it'll get stripped & tossed aside like the useless cruft that you are.