### Description
Flat and Gouraud shading. Different shading methods can dramatically improve the look of an object represented with polygons. On the top, flat shading uses a constant surface normal across each polygon. On the bottom, Gouraud shading interpolates normals from polygon vertices to give a smoother look.

In this example, the flat and gouraud images for each pair have linked cameras. Rotate and zoom a pair to get a better look at the differences.

!!! info
    See [Figure 3-7](/VTKBook/03Chapter3/#Figure%203-7) in [Chapter 3](/VTKBook/03Chapter3) the [VTK Textbook](/VTKBook/01Chapter1).
