The following images were created using Photoshop actions, and manipulating the layers generated.

Two buoys on a lake – watercolour effect

Using photoshop cc and watercolour actions, created a brush layer painted over the image with broad strokes then ran the action on the brush layer.

View from Blea Tarn to Langdale valley

Second attempt using the actions and brushes in Ps CC this time adding brush strokes to the foreground.

Looking down the Langdale valley – Sketch effect

This time using an action called Sketch effect to give the impression of a scratched surface and the adjust the exposure of the surface

Comic Book Effect