Determining property mapping resources with property constraints in an additive manufacturing

Processing apparatus comprising:

• a memory storing a plurality of attainable property parameter combinations in object generation;
• an interface to receive an object property specification in relation to a property;
• and
• a mapping resource manager to:
• determine, for the plurality of attainable property parameter combinations, a hull defining a property gamut;
• determine a hull of a modified property gamut meeting the object property specification;
• and
• determine, based on the modified property gamut, a property mapping resource complying with the object property specification.

A non-transitory machine readable medium storing instructions which, when executed by a processor, cause the processor to:

• determine, from an object property gamut, a reduced gamut hull in which a property of the object property gamut is constrained;
• populate the reduced gamut hull with a plurality of predetermined attainable property parameter combinations of object generation;
• and
• provide the populated reduced gamut hull as a mapping resource.