Pattern image onto a product

Not sure if this is what you want. I put the photo of the dog on the changing pad. I made a selection of the pad to mask the image of the dog. I created a duplicate image of the pad to make a displacement map. I gave it more contrast and density: neutral doesn't move the image; white and black move in opposite directions. I also slightly blurred the image to make more even transistions. The image of the dog, I made into a smart object so I could edit the displacement and sizing better. I applied the displacement map at 30 px movement in each direction. I duplicated the original layer and placed it above the dog. I set the blend mode to overlay to add highlights and shadows to the dog image. I clipped a curves adjustment layer to the overlay layer to adjust the brightness of the overlay layer.