Overlapping border and internal sections of object formed by different AM melting beam sources in overlapping field region

A non-transitory computer readable storage medium storing code representative of an object, the object physically generated upon execution of the code by a computerized metal powder, multiple melting beam source, additive manufacturing system, the code comprising:

• code representing a first portion of the object to be built in a first overlapping field region of a plurality of melting beam sources of the additive manufacturing system, the code for the first portion including:
• a border section of the first portion of the object to be built using a first melting beam source of the plurality of melting beam sources in the first overlapping field region;
• an internal section of the first portion of the object within the border section to be built using at least one second, different melting beam source from the first melting beam source in the first overlapping field region;
• and
• wherein the code overlaps an entirety of an internal edge of the border section of the first portion of the object with an entirety of an external edge of the internal section of the first portion of the object.