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Sadly the output is 4K UHD video format, but game's engine (UT2.5) can't handle this resolution - so it is a little "fake" as UHD is 240 x 12 (hight) and this game engine could make it "only" to about 240 x 9 - so the result is "intermediate" in quality between FHD and UHD. We will stand at FHD then as the rendering process of UHD is more than 2x in length to FHD, but quality is not ;p