Adding Lens Shaders to the Camera
The camera shader stack is useful for assigning multiple lens shaders to a camera.
To display the camera shader stack
1. From the camera’s property editor, click the Lens Shader tab.
2. Specify which lens shaders the camera uses and edit their properties.

3. You can also apply lens shaders to a pass (these are considered global lens shaders) and you can decide which of the two shader stacks to use, what order they will execute in, or whether or not the global lens shaders will overwrite the ones in the camera stack. For more information, see Applying Shaders to Passes [Rendering].
Autodesk Softimage v.7.5