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NES
[[File:1376329482848Retroarch_2013-108-16_06-32-24-62.png|thumb|250px320px|Example of faulty visuals that result from crop overscan not working. Note the blank blue area to the left and the green garbage on the right.]]
Crop overscan does not work properly in NES games. Even if you turn it on in the options, it has no effect, likely because the NES cores have not been configured to make use of it. While this isn't always a problem, some games such as Super Mario Bros. 3 have blank areas or show garbage on the sides, quirks that would have been hidden on a real TV due to overscan. With the lack of overscan cropping, these blemishes become fully visible. If this bothers you, there are shaders which crop a certain percentage of the edge pixels, such as [[CRT-Geom]].
[[Category:FAQs]]
