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How to add soft photo glow on Mac

Apply an Afterglow look to a portrait in Light Mixer, then compare the edited photo side by side with the original.

4 stepsUpdated 12 Nov 2026Get Light Mixer: Atmosphere Lab
What you'll achieve
You will have a portrait with a soft warm glow applied and a split comparison that lets you judge the edited result against the original.
What you need
  • Light Mixer: Atmosphere Lab for macOS, version 2.0.
  • A portrait or landscape photo you are permitted to edit.
Light Mixer showing a portrait in Original/Edited split view, with a soft golden glow added on the right.

A gentle lighting look can change the mood of a portrait without replacing the photo. This guide uses Light Mixer's Afterglow treatment and Original/Edited comparison to review the effect before you continue editing.

  1. 1.Open a portrait photo

    Open Light Mixer and import the photo you want to edit. The image appears in the editor next to the available looks.

    A portrait photo loaded in Light Mixer, with the Looks collection visible to the left.
    A portrait photo loaded in Light Mixer, with the Looks collection visible to the left.
  2. 2.Preview the Afterglow look

    In the Looks section, select Afterglow. Inspect the lighting preview to see the warm atmosphere it adds without committing the change yet.

    The Afterglow look selected and previewed, with Apply and Cancel controls at the bottom.
    The Afterglow look selected and previewed, with Apply and Cancel controls at the bottom.
  3. 3.Apply the soft-glow effect

    Click Apply to keep the previewed look. The updated image appears in the editor, where Light Controls and the light stack can be used for further adjustments.

    The glow applied to the portrait, with the Light Controls panel and light stack visible.
    The glow applied to the portrait, with the Light Controls panel and light stack visible.
  4. 4.Compare your result with the original

    Change Comparison mode to the split view. Move the divider between Original and Edited to inspect the glow against your starting photo.

    Split comparison of the original portrait on the left and the warm glowing edited version on the right.
    Split comparison of the original portrait on the left and the warm glowing edited version on the right.

Tips

  • Preview the look before applying it so you can judge the lighting on the subject.

  • Use the Original/Edited split to check facial detail and the brightness of the background.

  • Watch outThe appearance of a lighting preset depends on the source image and the placement of its highlights.