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can't you make a game index where the resolution is listed?
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The PS2's GS was capable of outputting any resolution up to a max of 1920x1080. Obviously no game used this, bandwidth constraints and raw power simply not being there, etc. -- but yeah.
As for GT4 and Tourist Trophy's "1080i" modes, it wasn't even true 1080i at that.
A 'true' 1080i frame is 1920x1080. A 1080i *field* (since it's interlaced) would be 1920x540. The PS2 couldn't even realistically process that type of frame (it couldn't even do a full 1280x720 frame), however gimped it is, so those games utilized a form of trickery to achieve this resolution. What Polyphony opted to do instead was render each frame as 640x540 by tripling the horizontal rendering resolution. They achieve this by 'squishing' the 640 frame and then stretching it out via simple post-processing/upscaling instead. This causes those pixels to show up three times instead of only once, which is why a lot of people reported 480p offering 'better image quality' than 1080i did. So in a sense, you're getting 1920 pixels horizontally, just not 'true native' pixels, causing the image to look a little distorted and compressed.
This is why PCSX2's internal scaling is superior to the in-game 1080i option. It's generally best in most cases to not bother with the in-game progressive/alternate render output modes, however in some games you can notice a slight improvement with them enabled.
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Even ps3 in the resolution of 720p in bf3 compaired to pc's 720p in bf3 u see the graphic diffrence . Pc got best. This is what an old age console not truely renderer hd resolutions.
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1080I is worse than 720P. I don't know why anyone would want to use it.
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