Yes, there are a number of options available to enhance photos and turn them into paintings or sketches.

• Using image filters from the Filters > Artistic menu. For charcoals, oils etc. This is a single click result.
• There are 100's of cloning brushes which give a wider variety of results then the first option but requires more effort but artist skill isn't required.
• Combining, filters and brushes from the Process - Photo Retouch and Process - Special Effects ArtSets you can get a wide variety of artistic results.
• Additional brushes, tools and filters through-out TwistedBrush can achieve great results for example the Blending brushes, Texturize Bump Filter for apply a canvas texture or Bristle brushes for adding a brush strokes textures.