1. Color Scheme
Before I start I first create a color scheme for which I will be using throughout the painting.
2. Rough Sketch
I first fill the background with a base skin color and then using my custom sketch brush I roughly draw the shape of the lips.
3. Rough Color and Form BlockingThen I start roughly building the form of the lips with a basic hard-edged round brush. While also blocking in basic color and shadow.
4. Rough Lighting
Next I start roughly blocking in some light to this image. I decide that my light source will be coming from above and will be a cool light so for the highlights I choose a very light pale blue.
5. More Lighting
Now still using the basic round I start refining the shape of the lips and building the form even further with light and shadow.
6. Color Blending
Now I take a custom spotted brush with a low opacity and start blending the colors while shaping and refining the lips further.
7. More Blending
I then take a custom textured round brush with a low opacity and do a bit more blending.
8. Final Blending and Softening
I do the final blending with a soft edged brush and also use the blur tool a bit until I am happy with the result.