Correcting Tone and Exposure - Beginning Photo Retouching and Restoration Using GIMP - page 69

Figure 3-41. Painting on the layer mask restores some of the original tone
The result is much better (Figure 3-42 ). Using the layer mask is a way to perform selective tonal
corrections with precision, by varying the brush opacity or using shades of gray as the paint color to control
the pixel transparency.