It's complicated. The signal to the screen never changes, because it's analog and it's literally driving the television so it can't, but what is rendered by the GC/Wii can change significantly and how VI adjusts the image within that signal can change too.
For example, Wii VC titles render in 240pish (let's ignore that 224p business for simplicity), however they output in Double Strike mode (240p on a 480i signal) like the original hardware did. If you look at the output, it's still a 480i signal, it just looks like this and VI makes the television squish it and tada, a progressive 60fps image on an interlaced signal.
Also almost no games are -exactly- 640x480, usually games go a little over and expect cropping from the television to handle it.
For example, Wii VC titles render in 240pish (let's ignore that 224p business for simplicity), however they output in Double Strike mode (240p on a 480i signal) like the original hardware did. If you look at the output, it's still a 480i signal, it just looks like this and VI makes the television squish it and tada, a progressive 60fps image on an interlaced signal.
Also almost no games are -exactly- 640x480, usually games go a little over and expect cropping from the television to handle it.
![[Image: RPvlSEt.png]](https://i.imgur.com/RPvlSEt.png)
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