Make a copy of the plane's layer (ctrl+j) and blur it out on the given direction, using Filter ? Blur ? Motion Blur (place it under the basic layer).



Now we have to distort a little the blurred layer, applying Edit ? Transform ? Distort.



Minimize the layer's Opacity till 55%.



Now we have to introduce the wolf's shadow on the stone, choosing the Burn Tool.



Blur out a little the edges of the box, using the Blur Tool.