hi @tuanphan i'm trying to do a similar thing, though your code doesnt seem to work as I have the parallax effect on it. essentially in need to either change the rotation of the background texture by 90deg (while retaining the parallax) or swap the image... but i can't get neither to work!
https://www.finelinearchitecture.co.nz/ (scroll down to"our values") - view as mobile and you will see the content stack vertically, making the section much taller, making the (landscape) background image scale up to a point that it is really blurry