What can be done to potentially fix sharp edges in three-dimensional models after importing them into Unity?

Calculating normals to a smoothing angle value is essential for addressing sharp edges in three-dimensional models imported into Unity. Normals determine how light interacts with the surface of a model, and altering the smoothing angle allows Unity to interpolate normals across adjacent faces. This results in a smoother appearance, particularly at edges where different faces meet. By increasing the smoothing angle value, faces that are close in angle can share normals, enabling a more visually appealing transition and reducing the perception of sharp edges.

In contrast, changing texture settings primarily affects the surface appearance rather than the geometry itself and won't smooth out the physical edges. Importing higher resolution models might improve visual quality but could lead to performance issues or may not address the sharp edges if the normals are still poorly calculated. Reducing polygon count can help with performance but may exacerbate sharp edges by removing detail that helps create smoother transitions in lower-resolution models. Hence, recalculating normals based on a desired smoothing angle stands out as the most effective method to achieve a better visual result in this scenario.