How to set box-shadow to an <img> tag which has an image with transparent corners? (CSS)

Question

My image has transparent corners, like an icon. But how do I set a box-shadow for the <img> tag which is not square-shaped? I want a shadow which follows the shape of the current image. Is there any CSS solution for this?

Answer 1

As far as I know the only solution is set a shadow for the image in a picture editing software e.g. photoshop