object not effected by GI

[Bart247]

I rendering an animation with GI and need replace one of the objects and re-render.

Is there a way to add a blocking plane or object in the scene that is visible but not effected by GI or reflections? I want to place it in front of my camera and have a hole to only show the replaced object while blocking the rest of the scene so it cuts down on my render time.

Any suggestions on how to do this differently are welcome?

[stezza]

Assign object properties node, turn on matte object and effect alpha on everything except the object you want to see.