I’ve been struggling for a while now with letting elements flow in the same direction while scrolling.
I’ve tried invisible triggers in my header, as well as layers with working with the Z-index.
I’m planning to build a page with a depth layer effect that has interactions for elements in two ways while scrolling like http://fiorito.nl/ and http://e03.epicurrence.com/
Anyway webflow or any other CMS / builder cannot give you options to build very complex animations on scroll (this is more for code writing) . For this the most known library is (A lot of AAAwards sites use this library) is this one: