Originally posted by HHarm
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HDTVs are 60fps. You either update every frame and get 60fps, or you update ever 2nd frame and get 30fps. Every third frame is 20fps.
To get any other frame rate you either update eratically, ie. update frame 1,2,4,5,7,9,10 etc, skipping where you have to. This will give a very messy and ugly display. Or you can turn the vsync off, which results in partially drawn frames being displayed. (or tearing as people often call it)
Sega Rally is vsynced and updates every 2nd frame, giving 30fps.
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