Subtle "Page Lift" Shadow

Greetings. I’ve seen this technique for a few years now but never really learned with this technique is called or how to achieve it.

Any links to examples or tutorials would be really appreciated.


This can be achieved by creating a lower dark/black layer (color of the shadow) with the shape you need and apply gaussian blur (test different settings) then add layer mask to decrease the intensity at the sides…

you can do this too with adding regular drop shadow then flatten the layer, use the layer mask or the burn/dodge tools to lighten or darken the regions you want!
I hope this helps!