Creating a Light Filter Using the GafferThree Node

Light filters allow you to modify a light's behavior in order to give these light sources additional effects. Light filters are renderer-specific, but regardless of renderer, you can add them in the GafferThree node in the same way.

To create a light filter with the GafferThree node:

1.   Create a GafferThree node and place it within the project.
2.   Select the GafferThree node and press Alt+E.

The GafferThree node becomes editable within the Parameters tab.

3.   In theGafferThree node’s Parameters tab, right-click in the Gaffer object table and select Add > Light Filter or press F.

A light filter is added in the Gaffer object table.

Note:  The light filter location is created under /root/world/lgt/gaffer by default. You can change the scene graph location by setting a new path in the root location field in the GafferThree node's Parameters tab.

Creating a Light Filter Reference Using the GafferThree Node

Light filter references are light filters attached to a light or skydome that reference another light filter package. These packages allow you to apply multiple light filter effects as only one light filter on a pre-existing light.

To create a light filter reference with the GafferThree node:

1.   Create a GafferThree node and place it within the project.
2.   Select the GafferThree node and press Alt+E.

The GafferThree node becomes editable within the Parameters tab.

3.   In theGafferThree node’s Parameters tab, right-click in the Gaffer object table and select Add > Light or press L.

A light is added in the Gaffer object table.

4.   Right-click the light and select Add > Light Filter Reference or press Alt+F when the light is selected.

A light filter reference is added to the light.

5.   Select the light filter reference and click on the Object tab beneath the object table list. Specify the path to the light filter package in the referencePath field.