Global illumination of the box.

Activates directional light.

Activates displaying of contour lines.

Defines width of contour lines.

Angel about X axis of the directional light.

Angel about Y axis of the directional light.

Strength of the influence (contrast) of the directional light.

Defines the color of contour lines.
Dragging color picker image you can select contour color from any place on the screen.