I just looked through my folders and found this:
*Load Camera Effect <filename$>, <effectID>, <loadTex> - Loads a camera effect into an ID, separate from object effect IDs
*Delete Camera Effect <effectID> - delete a camera effect
*Camera Effect Exist <effectID> - returns 1 if effect exists
*Set Camera Effect ConstantFloat <effectID>, <varName>, <value> - set a float variable in a camera effect
*Set Camera Effect ConstantInt <effectID>, <varName>, <value> - set an integer variable in a camera effect
*Set Camera Effect ConstantVector <effectID>, <varName>, <vector> - set a float vector variable in a camera effect, uses dbvector4
*Set Camera Effect <camera>, <effect>, <image> - set an effect to a camera, and output to an image, this command will also take control of image 65499, only camera effects can be applied to cameras
*Remove CameraEffect <camera> - remove an effect from a camera
*Sync Camera <camera> - render a camera containing a camera effect, no other cameras synced, only output is to the image from "Set Camera Effect"
It has been a very long time since I apparently created this file so I am not sure exactly where the info came from, but I would have to assume here on the forums...