The author of this tutorial is Joaquín Sánchez Navarro:
"A few days ago a colleague sent me a link to the program AKVIS Sketch, which can be used as as standalone program or plug-in to Photoshop to convert drawings into photos. I tested the program and encourage anyone else interested to try it too. Now I will describe how to use AKVIS Sketch, and the results you can achieve with it."
First open AKVIS Sketch’s workspace. If you are working with the plug-in, it will open in a new window from Adobe Photoshop.
The workspace contains an image window and a settings panel. Hints for any selected item are displayed at the bottom.
You can quickly and easily adjust parameters in the Settings Panel. In the Navigator Window you can zoom in to take a closer look at part of the image. A Preview Window within the Image Window lets you see how the image will appear after processing.
Here are some results obtained from the program: