curved

Hi, Is there any way to curve any source like a concave spoon in the curved region as seen in https://paste.pics/3160480518625bdab906fefe165c8974? Thanks.

Hello, im looking for a filter which can transform my browersource or my camsource into a curved effect like my monitor or a tv screen. i want to simulate a kind of 3d effect on my cam or my pause stream for highlight videos and youtube videos. does anybody know a good shader filter for this...