Hello, I play Gran Turismo 4 [USA/SCUS-973.28] On my PS2 slim (SCPH-90006) at 1080i resolution on my HDTV. It looks really jagged and aliased. So I'm wondering if the resolution is 1080i Native or upscaled from a smaller resolution? And will it look better if I downscale it to 720p or 480p.