Gouraud shading

From DmWiki

Gouraud shading is a method of shading in which a lighting equation (see lighting) is evaluated at each vertex of a model. The colors produced by the lighting equation are then linearly interpolated in between the vertices. While this is a very fast shading method, it is not very realistic. Recently, per-pixel shading methods, where the lighting equation is evaluated at each pixel, have become more popular (see shaders).