Idea

See the difference? Look at MKPC's version,
In MKSC's version the backround extends even BELOW the image of the track making a cool 3D visual but what about MKPC's version?
since the out color can show even if the a part of the track image is invisible  it makes it impossible for this 3D visual to happen and @Wargor's solution?
to add a 32-bit cloud image to cover the invisible areas.

 There should be a setting that can make the out color invisible and the option to make a bigger backround(the size of Super Circuit's big backrounds used for 3d effects),

The tracks that should have this feature bc their OG versions had it are: Boo Lake, Sky Garden, Broken Pier, and Rainbow Road.

This should also apply to some DS tracks like: Waluigi Pinball(the first half of the track's outer image should be invisible), Shroom Ridge, DK Pass, Tick-Tock Clock, Airship Fortress, and Rainbow Road.

ngl, that's actually a good idea, the base Tracks probably wouldn't change, since they almost never do, but for custom Tracks it would be awesome, maybe it could be like a toggle if you want it or not, and the backgrounds themselves have to be the top 1/4 which normally appears plus the other 3/4 that you can only see when there's no ground (1/4 because for what I saw the backgrounds are basically a fourth of the entire screen)

A smart idea made by a regular person in on MKPC??? THIS IS WITCHCRAFT!

idk