Can't work out how to get a sliced effect

[satkin2]

I'm trying to make a page with the effect of slices cut into it as if for inserting into, the corners of a frame then appearing to slot in to the slices. Something like this...



My background is textured, which I'd need to be continued on the top of the curve.

I think I just need to make a curve shape with a shadow, but I've tried various ways and it just doesn't look very good.

Any guidance on how I might achieve this please?

Thanks

[Vladstudio]

Hey, take a look:
https://cdn.vlad.studio/c44852e84a566fcf21548f392b53d978.zip

[satkin2]

That's perfect, thanks very much. Looking at all the components has really helped me understand how this works.

[Aurelija]

Hey, take a look:
https://cdn.vlad.studio/c44852e84a566fcf21548f392b53d978.zip