Modifying a base layer of an object

A non-transitory computer-readable medium having a set of computer-readable instructions that, when executed, cause a processor to:

• read an original model of a three dimensional object;
• define a base layer within the object of the original model by setting a thickness for the base layer of the object of the original model based on a thickness at which a corresponding base layer of a three dimensional object to be printed obtains sufficient rigidity to resist internal stress-induced deformation of the base layer of the object to be printed;
• modify data of the original model, the data of the original model being modified by adding data for a number of protrusions extending from the base layer of the object of the original model, the added data based on a propagation of stresses to be provided in the base layer of the object to be printed by a corresponding number of protrusions formed in the object to be printed according to the modified data, and the protrusions of the object to be printed configured to be formed integrally with the base layer of the object to be printed and from a same build material as the base layer of the object to be printed according to the modified data;
• and
• output the modified data for production of the to-be-printed three dimensional object, the three dimensional object being produced including the number of protrusions and the base layer corresponding to the number of protrusions and the base layer of the modified data, respectively.