Shadows and light
I place a layer on top with a light grey tone for the shadow and then I create a layer mask to erase where I’d like the light to hit the figure. I want to cover her with shadows, to suggest a light source that’s behind her. This enables me to play with subsurface scattering on her hair and skirt. I also create a Linear Dodge (Add) layer containing green to bring in some diffuse light from the sky.