matrixchairthing

The top image is the original image and the bottom image is the matrix image. You should began by simply erasing away the chair and the using the polygonal lasso tool and clone some grass to put in the empty void where the chair was. After that's done use the polygonal lasso tool on a new layer so you can add a shadow effect under the man by going to stroke and put 4 pixels for the width use the color black and location would be inside. right after that  use a Gaussian blur on the shadow and then if you want fix the grass by using the spot healing brush.