07-14-2020, 08:30 AM
Renderers typically only sample what's visible, although of course the initialization of objects and scene BVHs will include objects behind a camera....I think this type of thing is better implemented by the developers of renderers themselves, especially because 3dsmax has real issues with hiding/unhiding nodes between render frames (it's not possible or supported by default and must be implemented on a per-renderer basis).