Currently Being ModeratedAug 23, 2013 11:26 AM (in response to Jasonspenceclark)
Aperture provides Brushes for most Adjustment Bricks. Brushes allow you to selectively apply the adjustment to the Image.
Here is the User Manual page on using Brushes.
Note that there are Quick Brushes as well, including one for saturation.
For your "want", you should see what you can do with "Detect Edges" turned on.
Also try the various ways of seeing your Brush mask. These are listed in the Action Menu (the gear icon) of the Brush HUD.
Currently Being ModeratedAug 23, 2013 11:54 AM (in response to Kirby Krieger)
this is not working because the image face was too red to begin with, its not something I added...
Brushing Adjustments Away
When you want to apply an adjustment to most of an image except for a specific portion, you can specify the parameter settings for the adjustment and then brush the adjustment away from the areas of the image you want to exclude. Brushing an adjustment away from an image is the same operation as using the eraser brush.
Currently Being ModeratedAug 23, 2013 1:18 PM (in response to Jasonspenceclark)
Did you try to vary any of the settings?
Saturation is a parameter associated with every pixel. The Saturation adjustment lets you add to or subtract from whatever each pixel's saturation is in your Original.
Here is a face -- trust me, the redness looks normal unadjusted -- on which I reduced the saturation to zero on half. I used the Saturation Quick Brush to create the mask, and then moved the Slider in the Saturation adjustment Brick to zero. (Zero saturation = gray)
Are you not seeing similar results?