it was "solely" meant to be practicing to work on one layer (color, shading and lighting in one) using different blending options on my airbrush :v
and also tried to make sole a lil more "curvier".


usually draw and assign layers like that:

Layer: Ink (LineArt)
Layer: Screen clipped below (lighting)
Layer: Multiply clipped below (Shading)
Layer: Flat Colors

this time all 3 layers flat color multiply and screen are added as one in this drawing piece, the advantage is you can blend both shades and lighting better together since they share the same layer
downside is it takes longer to shade and gotta be more cautios and patient with that.