I’ve got 3 weeks down and 7 to go in the Intro to iPad Art class I’m teaching at the Yellow Barn Studio. We have covered some of the most basic how-to information about the ArtRage app and are now exploring/practicing various tools.
In the last week, at the suggestion of Walt Bartman, I tried simulating a traditional oil painting technique – making a monochrome value-study by rubbing out highlights in a toned canvas and then adding color at the value levels developed in the preliminary study. In the iPad framework, I used the paint roller to make a solid underpainting and then used a soft eraser to ‘rub out’ the lighter passages and then added a few darker areas using the chalk tool to capture the darks.
Here are the two stages of the first work I did with this method, painted from our lovely live model Kuniko. First, the study:

Kuniko in kimono, monochromatic iPad study.
And then the colored version:

Kuniko iPad study, developed with color.