Creating a Spot Light
An area light source can be created in the GafferThree node parameters panel...
A spot light in the GafferThree node parameters and in the Viewer.
Controlling a Spot Light
The object tab serves to select the Spot Radius of the spot light and wether it is Visible to Camera. It also presents the light's transform (which can be edited interactively in the Viewer). The Material tab serves to control several parameters of the spot light. The effect of these are explained and illustrated in the next section.
The object parameters of a spot light.
The material parameters of a spot light.