Additive fabrication techniques with temperature compensation

A computer-implemented method that, when executed by data processing hardware, causes the data processing hardware to perform operations comprising:

• receiving print instructions for a three-dimensional (3D) object, the print instructions including a sequence of print maps corresponding to a sub-instruction for producing a respective cross-section of the 3D object;
• determining a resin temperature at a print plane associated with a first print map of the sequence of print maps;
• generating an updated print map by expanding or contracting an outer perimeter of the first print map based on the resin temperature associated with the first print map;
• exposing, by an energy source, resin stored at the print plane according to the updated first print map;
• after exposing the resin, obtaining a second temperature of the exposed resin at the print plane;
• comparing the second temperature of the exposed resin to a simulated temperature model associated with the print plane;
• and
• when the difference between the second temperature of the exposed resin and the simulated temperature model exceeds a predetermined threshold, modifying the updated print map to generate a second updated print map by modifying one or more of the outer perimeter, an exposure time, or an exposure intensity.