So apparently the internal function FindPartOnRay is not a valid member of Camera.
This is crucial for a project I'm working on that has everything client sided. I tried Region3, but had the same issue. Is there any possible way I can check inside the camera for a part's existence within a chosen point?

2 comments
It isn't a method of the Camera object, it's a method of the Workspace.
Just Use, WorldToScreenPoint Or ViewPoint