04 Adding another curves adjustment
My picture looks too light though, and because of the way the solarization curve interacts with other adjustments (more on this shortly), I can’t just reduce the Exposure or Brightness sliders.
But I can add another curves adjustment, and this is one of Aperture’s best-kept secrets – to do this, click the ‘gear’ icon at the top right of the existing Curves panel, then choose ‘Add New Curves adjustment’ from the menu…
05 Darkening the image
In this second panel I can carry out a more conventional curves adjustment, adding a control point in the middle of the curve and dragging it downwards to darken the image.
This is getting much closer to the result I want, but the white boards of the hut in the foreground are looking a little muddy because they’ve been partially solarized… and this is where the Aperture Brightness slider comes in…
06 Brightness adjustments
If I move the brightness slider now, it doesn’t have the effect you’d expect. By reducing the Brightness value I can in fact make the hut appear whiter, because I’m darkening it to the point where it falls below the solarization threshold. You can think of the Brightness slider as being a way to balance the solarized and non-solarized parts of the picture.