A 3D model of a broken sword could depict a sword that is fractured, cracked, or severed at various points along its blade or hilt. The level of detail can vary, from simple geometric shapes to intricate designs with textures indicating wear, rust, or battle damage. The broken sections may be jagged or cleanly cut, depending on the context of the model. Overall, the goal is to convey the sense of a once-powerful weapon now rendered ineffective due to damage or misuse.