fold effect in photoshop

[nickels]

hi,

just wondered if there was an easy way to get a fold effect in photoshop, like a corner of paper curled over?

i tried 'warping' the image but it didnt give the shadows it needs to look right

anyone know a way?
thanks
nickels

 

[nickels]

tar i will have a play, just wish it had something to do it automatically