The situation is also curious for titles where this is no progressive scan support in the original software at all. Despite the system settings being locked to 480p, the Wii runs these 576i titles at 576p at 50Hz, deinterlacing the output on the fly. The overall quality of the deinterlacing isn't too bad at all, but, similar to hardware back-compat PlayStation 3s, there is some noticeable shimmering on fine detail where the interpolation doesn't quite produce the right result. Games like MadWorld - which have no resolution boost - remain letterboxed and in a squashed aspect ratio, even though fairly simple code could have been introduced to check for PAL borders and re-scale the image accordingly.

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