Maps of the continuum intensity of selected sunspots. The white contours indicate a continuum intensity of 50% of the quiet Sun level. The other contours correspond to different strengths of the vertical magnetic field, evaluated at log τ = −0.9. Blue: 1650 G, green: 1750 G, and red: 1867 G. The white rectangles highlight regions of AR 10923 and AR 19069 that are shown in more detail later in the paper.