Hey Kjael,
the “background-size: cover” is indeed the solution that I’m already using in the theme ;) in case you meant the labyrinth images, they both have the “background-size: cover” now after you’ve updated the file I’ve sent you. The first labyrinth image doesn’t reach the bottom of the respective section because it is not tall enough – please try making it taller, so that there is some extra room for the parallax effect to roll out, or turn the parallax off on this section (the “Parallax background” option in the “Page settings” box in the page editor mode.
Please let me know if I missed something!
Sincerely,
Andrii / Satori Studio