how to you see the picture of another camera in the camera s Tweet

[Sunshine_wuyu]

how to you see the picture of another camera in the camera screen, as shown in the figure:

[frankmci]

As far as I know, you can't without pre-rendering the first camera view. I don't think there's any allowance for recursive rendering in either C4d or in Octane. It seems like a can of worms to code as a general purpose function.