Allows you to visualize Gaussian, minimum, maximum, and mean U and V surface curvature. Maximum curvature and a positive Gaussian value display as green; minimum curvature and a negative Gaussian value display as blue.
Positive Gaussian curvature means that the surface is shaped like a bowl. Negative Gaussian curvature means the surface is shaped like a saddle (as shown below). Mean curvature and a zero Gaussian value means that the surface is flat in at least one direction (planes, cylinders, and cones have zero Gaussian curvature).