This is another simple howto for another new feature - camera clipping (from beta 3.03 onward).
This allows for more flexible positioning of the camera and therefore more creativity and scope for interesting camera shots.
The main purpose was for interior scenes where you want to get a good shot of the whole room but you cannot do so without a very large FOV, because you need to keep the camera inside the room.
Now with camera clipping (near plane), you can position the camera outside the room - lower the FOV and increase the clipping plane distance in front of you until the closest walls are clipped out.
Example:
Notice that the camera position is outside the room geometry (which is clipped away) but you can still see the geometry in the mirror.
The geometry is not altered, only the clipping of the camera.
The below is about as good as it gets without camera clipping if you want to see the same content (left to right).
This is obviously terrible...
(you end up getting things in frame you really don't want such as gaps to sky etc)
The camera clipping setting is in the camera parameters and is called nearClipDepth and is in octane meters from the current camera position.