1) Duplicate the object layer, reduce its brightness and contrast, and place it below the object layer to create a shadow. 2) Distort the shadow layer by dragging its top handle to make the shadow fall to the left and below the object. Add a Gaussian blur to soften the shadow's edges. 3) Add a layer mask to the shadow layer and draw a gradient from white to black to make the shadow fade from dark to light as it extends away from the object. Adjust the shadow position for realism.

1. Cast Shadow