This picture of the painter and his model by Alfred Stevens (1823-1906) is well painted, but it has a problem. The model seems to be looking somewhere to the left of the painter's canvas.
Why does it look that way, and what could be done to fix it?
To place a figure squarely in front of the easel, Mr. Stevens would have needed to place the model's feet on the floor directly to the left of the red "x" that's midway between the wheels of the easel. But her feet are actually well beyond the spot opposite the far wheel. Since we're seeing her in profile, her view appears to be directed to the left of the picture.
The painting is in the Walters Art Museum in Baltimore, Maryland.