You'll probably have to adjust the contrast and make the picture darker so the outline/shadow of the nose shows up for the program to recognize it.
Muffy :)
I don't use Sfumato, but I looked at the tutorials. Would using a carving stitch along the outline of the nose help to give it more definition? It was only mentioned, not demonstrated, but I know it works well in Studio and it seems easier than fiddling with colour intensity.
Thanks, Martine. I sometimes covet a Sfumato-like program, but that's way down on the list! Hugs, M