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When you use an Unlinked STF (Ctrl + Click the "Radioactive" icon), PixInsight stretches the channels separately, which removes that heavy green or red cast and lets you see the actual nebula or galaxy detail. The Workflow: When to Toggle the Link

Raw astronomical data often has a heavy color bias, frequently appearing green due to the Bayer pattern of color cameras or atmospheric conditions. pixinsight lerar link

Perform processes like SpectrophotometricColorCalibration (SPCC) or BackgroundNeutralization . When you use an Unlinked STF (Ctrl +

Once the image is color-calibrated, you must Link the Channels . A Linked STF will now show the "true" balanced colors you just created. If you keep it unlinked after calibration, the STF will override your calibration and show an artificial color balance. Pro Tips for Managing the Link Once the image is color-calibrated, you must Link

Because raw data is "linear," it looks nearly black to the human eye.

Upon first opening an image, use an Unlinked STF to see through the color cast and gradients.

PixInsight calculates a separate, independent stretch for each channel. This effectively "neutralizes" the background by aligning the histograms of the individual colors. Why Linear Images Need "Unlinking" Initially