Design patents in the U.S. typically include two types of shading. The first and most common type of shading used in U.S.

Gouraud shading is the simplest rendering method and is computed faster than Phong shading. It does not produce shadows or reflections. The surface normals at the triangle's points are used to ...

Phong shading is more realistic than Gouraud shading, but requires more computation. It does not produce shadows or reflections. The surface normals at the triangle's points are used to compute a ...

the scientists tested the performance of all panels under different types of shading patterns and angles, including eight discrete shading scenarios and five continuous shading scenarios.