In the PlayStation version, the first level of Bongo Hills has this background:
This is the player’s first introduction to Band Land, and we get a real spectacle to look at: the rolling hills, the giant drums, cymbals and trombones, the piano keys stretching off into the distance. It’s one of the richest sights in the game, and it’s accompanied by vibrant music which suits it perfectly.
In the PlayStation version, the fourth level of Bongo Hills has this background:
Everything is in shadow. There’s no music, just ambient thunder. The skies are dark and starry, and Rayman is surrounded by clouds, giving a claustrophobic feel and the sense that the player is making progress and ascending.
The Saturn version switched these two backgrounds, and it makes absolutely no sense. Why would the level begin in clouds, then ascend into hills? The first level feels really underwhelming with the dull background, and the fourth one feels weirdly open without the claustrophobia. Making matters even more confusing is that they’ve kept the first level bright and the fourth level dark, which suits neither background. I have no idea what the Saturn team were thinking; I can only guess that they shuffled a few backgrounds about for the sake of it and got lucky a couple of times.