A Custom Mask for reveal while scrolling is that possible?

Hi everybody,

I would like to create a sticky reveal on scrolling section and I know how to build that but my problem is that I would like to have a custom mask like in that example on the Selected Projects:

If anybody knows how that might be done with custom code or a lottie file I would be really thankful.

My read-me file isn’t perfect animated as I’m trying to find a solution for my problem first.

Here is my public share link: [LINK]Webflow - New Portfolio

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