Layer mask not working with conceal brush
I have to remove the background of an image and I want to use a layer mask.
But when I use the conceal brush it does not conceal the area fully it looks like the brush is set with an opacity. Please see the attached image.
I have checked the settings and the colour mode is set in RGB and the opacity of the brush is 100%.
The reveal brush works fine, any help appreciated.
Thanks.

