Object model generation

A three-dimensional printing system comprising:

• a controller to:
• obtain modified object model data that includes a first version of a three dimensional model that is representable in a first pre-processing application without exposing a first sensitive portion of the model, and includes first object model data defining a full version of the three dimensional model for printing by a three-dimensional printer.

A method comprising:

• obtaining object model data defining a three dimensional model to be printed by a three-dimensional printer, the model comprising at least one sensitive portion and at least one non-sensitive portion;
• identifying the at least one sensitive portion;
• generate modified object model data including a plurality of encrypted versions of the model including a first encrypted version of the model that is visually represented to expose the at least one non-sensitive portion without exposing the at least one sensitive portion, and the modified object model data including the three dimensional model comprising the at least one sensitive portion and the at least one non-sensitive portion to be printed by a three-dimensional printer.

A non-transitory computer-readable medium comprising instructions, which when executed on a computing device, cause the computing device to:

• obtain object model data defining a three dimensional model, the model comprising a first sensitive portion and a non-sensitive portion;
• obtain data relating to the first sensitive portion;
• generate modified data that includes a modified model that is visually representable in a pre-processing application by exposing the non-sensitive portion and without exposing the first sensitive portion, and the modified data includes the object model data defining the three dimensional model comprising the first sensitive portion and the non-sensitive portion for printing by a three-dimensional printer.