The surface lighting properties of all parts in a displayer can be adjusted using four parameters:
The combination of these four parameters represents how the surface will reflect and absorb the scene lighting. By default, the ambient parameter is set to 0.0, and the diffuse parameter is set to 1.0, resulting in a relatively good setting to easily distinguish the depth and proximal relationships between three-dimensional objects in the scene. The default setting may not always be suitable for viewing scalar contours, as surfaces which are perpendicular to the view normal may become dark. In this case it is recommended to set the ambient parameter to 1.0 and the diffuse parameter to 0.0 to see the scalar colors clearly.
To change any of the parameters expand the Scenes node, any scene node and the Displayers node. Select any displayer which includes surfaces (geometry or scalar surfaces).
The value of each parameter may be entered directly under the Lighting expert property in the Properties window.
Alternatively, you can click the property customizer (
) to open the Lighting dialog through which the parameters can be set using sliders.
