A method for three-dimensional (3D) printing. The method includes: obtaining a native file of a computer-aided design (CAD) application; identifying, within the native file, a first 3D shape associated with a 3D infill pattern; generating a slicer description language file including: a first section specifying the 3D infill pattern; and a second section including instructions to print the first 3D shape filled with multiple instances of the 3D infill pattern by referencing the first section, where the first section and the second section are separate in the slicer description language file; and sending the slicer description language file to a 3D printer for printing the first 3D shape filled with the 3D infill pattern.