Hi:
Since I started a new project yesterday, I've discovered that masks sometimes behave as if they are invisible, and sometimes behave correctly.
It generally seems that the first time I apply a mask as part of a workflow, it works as expected, e.g. the mask protects the selected region of the image from being sharpened, as intended. But if soon thereafter I re-do exactly the same workflow, the same mask fails to protect the region against the same process. In fact, when the mask appears to fail, I can repeat the same process with and without the mask in place, and PixelMath finds no difference, pixel by pixel. I've tried this several times, to check (as best I can!) that I'm not doing something goofy
![footinmouth :footinmouth:](http://pixinsight.com/forum/Smileys/default/footinmouth.gif)
.
I have not yet installed the new release of PixInsight, but the last project I completed, just a few days ago, worked fine
![smile :)](http://pixinsight.com/forum/Smileys/default/smile.gif)
. I did try a Cntrl backdoor reset, and the problem was still there
![Cry :'(](http://pixinsight.com/forum/Smileys/default/cry.gif)
.
Perhaps time to install the new release? Thanks for any comments, just in case the problem doesn't go away
![Grin ;D](http://pixinsight.com/forum/Smileys/default/grin.gif)
.
Howard.