To do the first image, I used artistic filters and also a very strong unsharpen mask and smart blur. On the second one I used a cloud filter and changed the opacity to around 30%, then duplicated the layer and added pixel's to that one. I then erased parts of the layer so that only certain area's had pixels.
To create this image I used an image of a Polar bear and using the lasso tool, cut him out and placed him on this image of a cliff. I edited around the image using the magnetic lasso tool at a feather of 5px, and also the eraser tool. I used colour layers to get rid of the image of a guy who was jumping of the cliff, and then also added circle brushes at a low opacity to the water to give it a shine. I used selective colouring and colour layers to make it seem like more natural looking and like the polar bear was part of the image.