This example will teach you a method to convert a photograph to painting, it is very easy by using this example so follow all the steps that's have been given in this example.
Picture: Take a picture to convert a painting effect.
Filter Effect: Now use filter effect, I have used here four filter effect that are given below.
Filter > Artistic > Paint Daubs
Filter > Artistic > Poster Edges
Filter > Artistic > Cutout
Filter > Artistic > Palette knife
You will get similar as here.
Recommend the tutorial