Solid rendering

Solid rendering is a somewhat more complex rendering algorithm than wireframe in which rudimentary shading techniques are used.

Each mesh in the scene is made up of polygons, each one a color. The solid renderer calculates the vector normal to each polygon and calculates (often using a dot product) how perpendicular the polygon is to a point light source. In this way, the closer the angle formed by the normal and the vector that is in the center of the polygon is to zero, it is considered that the polygon must be more illuminated.

Shading is uniform for the entire polygon.