Light Filters are used to manipulate lighting results. In the real world, stencils and gels often achieve this by changing the color, quality, and amount of light in a shot. RenderMan's light filters are a powerful and flexible way to do the same (and even more) in lighting your scenes. 

Working with Light Filters in Solaris is simple and will instantly transform your lights and lighting!

In the example above, there is a single PxrCookieLightFilter applied to a DiscLight, and a colored map is then added to the PxrCookieLightFilter to create a colored gobo effect.

Begin by creating a pxrlightfilter node 

Under Primitive Type, you can add and chain various light filters to your light.  In this instance, we want to add a PxrCookieLightFilter.

You can see from looking at the Scene Graph Tree that a new light filter has been added.  





You can adjust both the Light Path and Light Filter Path to parent the filter to your desired light

add in your gobo texture and adjust the filter properties accordingly. 

With the filter selected in the Scene Graph Tree, you can now control the placement, scale and rotation of the PxrCookie Light Filter.  As you have also parented the light filter to the SpotLight, transforming the light itself will also transform the light filter too.

You can also add multiple light filters to a light.  Below, we have added a PxrRodLightFilter to the same light and parented it under lights/Spotlight




If you have multiple light filters assigned to a light, to be able to select them individually, you need to press the G key when over the Solaris viewport.  The currently selected light filter will be highlighted in yellow and the transform manipulators will be shown for that selected light filter

Example