A system is disclosed for use in additively manufacturing a structure. The system may include an additive manufacturing machine, a memory having computer-executable instructions stored thereon, and a processor. The processor may be configured to execute the computer-executable instructions to make a determination associated with the structure being a performance-critical part and, based on the determination, selectively implement a first slicing technique or a second slicing technique to divide a virtual model of the structure into a plurality of planes. The processor may be further configured to execute the computer-executable instructions to cause the additive manufacturing machine to deposit composite material in layers corresponding to the plurality of planes.