Eww...and again. No love for Cinema4D haha. I thought this kind of feature would be "universal" (cross host application : cinema 4D, 3ds Max etc).
How is this done in C4D for other renderers? (I mean, is there a native C4D feature for this?)There is something different, less "handy" than the Fstorm OpticalZoom or Corona 2Dpan, with Redshift and Arnold, in the IPR window, you can over ride the original resolution (the native one from the C4D settings) to anything you want. Scale it in % or pixels. You have to do it manually, it can be faster with Scale (in %). I don't really use it since it's not as handy as the Corona or Fstorm version.
I can't see how this is different from max's 2d pan and zoom, which is already supported by Corona in interactive rendering.