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This article was prepared with AI assistance based on an analysis of the current Lumina Studio source code, existing Wiki content, and relevant workflows. It has been checked against the current version, but omissions or details that become outdated may remain as the software evolves. If you find an error or have a clearer explanation, example, or suggestion, please leave a comment on this page or propose an edit on GitHub.

Auto Gradient Replacement

When a material profile maps a continuous gradient to a finite set of recipes, a smooth area can become several similar bands. Auto Gradient Replacement detects these groups after preview and replaces every colour in a group with the representative colour that covers the most pixels.

Auto gradient replacement in System Settings

Processing order

  1. Complete normal image processing and material colour matching.
  2. Analyse gradient-band groups in the preview.
  3. Select the colour with the largest pixel count in each group.
  4. Confirm the replacements as a batch and refresh the 2D and 3D previews.

Images with many gradients therefore perform one extra replacement pass after the initial preview, so the final image may appear slightly later.

Default behaviour

The option is off by default. With it off, the raw matched result remains available for inspection in Color Workstation. You can review each detected group and apply the same operation manually, then undo or refine individual changes.

The operation reduces banding caused by a finite recipe set. It does not increase the available colour count and does not change regions that were not detected as part of the same gradient group.

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