It's not the SIZE of the render, but the PROPORTION of the render when comparing document window to new window. If your document window is 100x100 and you render to a new window at 10000x10000, it will be exactly the same 'framing'. But, if you render to 1000x10000, the width will be 1/10 the proportional width of the document window size - literally, it'll crop it so that the height is still the same and width is adjusted down to fit. I've done extensive tests on this for importing scenes into Cinema 4D (and trying to keep the render settings as close to Poser's). This is how it works. BYS