Essentially render the camera extents to get the same image as what you would see in the picture viewer - rather than the whole viewport which is usually not the same proportion. Its gives a better idea of the final output composition and also doesnt waste time rendering the borders which aren't going to be visible in the final composition. Vray does this so it should be possible in the SDK. That would be great - or at least a tick box option in the settings for those that would rather it the way it is. Thanks.
