I’ve seen design elements on webpages that contain a “bent paper” effect. In other words, it looks like the paper is shaped in an arch, based on the visual perception of the shadow.
How do I achieve this?
EDIT:
I found an image:
Answer
Shadow gives the perception of how the paper is bent.
In this screen shot, the two yellow rectangles are identical. To achieve the shadow effect, just duplicate the rectangle layer, fill it with black and blur 2-3px. then edit->transform->warp to bend the shadow shape. you want to move the shadow layers by a few pixels to the direction that’s against the imagined light source. also play with the transparency too.
Attribution
Source : Link , Question Author : Moshe , Answer Author : Jin