Advice about Lightroom masks and "artefacts"

Started Jun 23, 2013 | Discussions thread
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jamesbm
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Advice about Lightroom masks and "artefacts"
Jun 23, 2013

Hi

I have a beginner question about using the mask tool in Lightroom 4 on a mac.

When i apply an auto mask using the brush and apply some basic exposure changes etc, I sometimes see a light band or series of white "artefacts" around contrasty edges. This is quite obvious when I review the image afterwards.

Subsequent mask attempts don't seem to correct this effectively. In fact the artefacts appear to be almost permanent and unmovable.
Does anyone have any practical advice for correcting or avoiding this issue in the future?

Many thanks in advance!

Image with mask applied to sky

Close up of "artefacts" after auto mask

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