Stretched image

Saturation tool

Richer colours, without shifting the hue; overall or one hue at a time.

How to use it

1. Open Tools and click the tool: it is added after the selected step.
2. Move its settings: the image follows as you move them (Live preview).
3. Press Apply to keep the result. Before / after compares at any time.

One colour at a time: right-click a colour on the image, keep the button down and drag right or left. That hue and its neighbours get more or less saturated.

Settings

Amount

Positive: richer colours. Negative: towards grey.

Protect the dark sky

Keeps the background noise from turning into coloured blotches.

Hue strip

The hues set apart: a point above the line is more saturated, below it less.

Mask

Everywhere, Bright parts (the object, not the sky) or Dark parts. Stars are not in the mask.

Threshold

Where the mask starts, from the sky background (0 %) to the brightest part of the object (100 %).

When to use it

After the stretch, once the contrast is set. Works on the nebula, or on the stars layer alone.

Image

Works only on a stretched image.

Example

withoutwith Saturation