Some months ago I discovered a TV channel that is showing off all the old Bob Ross shows. "Awesome!", I thought, "Let's get the oils!". Then I remembered that I had given most of my old tubes and brushes away, so I thought of how Ross' technique could be transferred to the computer.
Since Painter is known to be so "accurate" with imitating traditional painting techniques, I tried to use that at first. But I got soon to be very disappointed with the virtual painting knife which is essential to use a Bob Ross technique.
So I switched to Photoshop and used some custom brushes instead and then it worked just fine. Also attached are some working steps. ;)