I have done several lithos using PhotoVCarve. The software is just great. Easy to use with great results.
This one is of one of our cats who we lost a year ago.
There are more pictures here. Other lithos I have done are here.
The backlight is provided by a LED panel from these folks. Pricey but gives excellent light. I will probably use something less expensive and keep the LED panel for some other project. I also plan to add another litho on the other cabinet door as soon as I have a good enough image.