Hey guys, I'm sorry to have to ask this but I'm still new to Cinema 4D. I felt I would ask this question because everytime I Google it I usually get results for people having the opposite problem.
What I'm trying to do is, say I have a box or a lightsource. I want them to still interact with the scene but not be visible in the final render. Like I have a shadowbox lighting a logo for example but when I zoom out, you can see the light and textures on the shadowbox.
the Compositing tag is what you are looking for. In the example you would attach one to the lightbox and uncheck 'Seen By Camera' - if you don't want the reflection of the light/shadow box on the floor but still want the light on the floor around the red objects you would need to add the floor/plane/whatever you are using to the Exclusion tab of the Compositing tag and make sure the reflection icon is dark (the icons are - Transparency, Refraction, Reflection, Hierarchy) when the icon is dark it's enabled so reflections fron the shadowbox off the floor would be ignored