3D Viewer: Lighting/Background Control
The lighting and background settings can be controlled by the user.
The background is specified by two colors. The 3D Viewer will draw the background as a gradient from one color to the other.
Lighting can be enabled and disabled.
When enabled, one can specify whether the light should come from a set direction, or be attached to the camera.
The color of the Ambient, Diffuse, and Specular lighting properties can also be adjusted.