Creating an Incandescence Light

An incandescence light source can be created in the GafferThree's Object table by right-clicking in the light list section and selecting Add → Incandescence Light, or by pressing the I key. Incandescence lights are not drawn in the Viewer; the object they control normally is.

The Incandescence Light allows editing the incandescence attributes of controlled objects in the GafferThree node. The difference between a mesh light and an incandescent light is that the later directly controls the incandescence parameter of the materials applied to the controlled objects. One incandescent light can control as many such object/materials as desired. Another noteworthy difference:  this light also allows the incandescence to be output in its own Multi-Light layer in DlSettings. 

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The Incandescence Light in the GafferThree node.

The Incandescence Light can control a single object or a group of objects. Its color, intensity and exposure parameters can be used to edit the controlled object incandescence attributes. 

As with any other GafferThree lights, incandescence lights will be listed in the DlSetting's Multi-Light list; the controlled object incandescence can thus be output in their own Multi-Light layer. They also can be edited by 3Delight Display's Mixer. 

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The Incandescence Light in the GafferThree node.

Shaping the Incandescence Light

The Geometry to Control parameter from the Object tab specifies the scene graph location of the object or group of objects whose incandescence attributes will be controlled. The location can be set by middle-click and dragging a mesh or group scene graph location to the parameter, for instance

Controlling the light from an Incandescence Light

The Material tab  serves to control a few light parameters. Their effects are explained the the next section.

Parameters of the Incandescence Light

Color
Intensity
Exposure