SMS:Lighting Options
From XMS Wiki - http://wikis.aquaveo.com/xms/
This dialog allows the user to control the shading of faces in the SMS display. By default, all objects are displayed in the color specified by their [../Layout/general_display_options.htm display option] attributes. However, objects such as elements, cells and triangles which cover an area, can be more intuitively understood if they are shaded as a three dimensional entity. The shading options includes two toggles, one slide bar and a light position window.
Toggles
The first toggle allows the user to turn on the use of a light source. When this toggle is selected, the second toggle becomes available.
The second toggle tells SMS to smooth corners between adjacent faces. This allows the faceted surface to appear as a smooth surface.
Slider
The slide bar allows the user to specify the amount of ambient light. Ambient light is the minimum intensity (brightness) to be displayed. A recommended value is between 0.2 and 0.4.
Light Position
The right side of the dialog allows the user to set the light direction and gives a preview of that direction displayed on a sphere.
