Using the technique mentioned earlier in the ‘Patterns’ step, select the ‘skin layer and then draw onto the ‘skin shade’ layer. Try not to take the brush off the page as the next time the brush touches the page it creates a double opacity. When drawing shadows, keep changing the colour a little bit, making it darker with each layer, so as to build up the shade. When drawing highlights, such as the end of the nose or cheeks, select the ‘base’ colour and change it to a slightly lighter colour, and repeat the process used when shading darker. Remember that unless a person is in strong light or wet/shiny, there will always be less highlights than shadows. Repeat this process for every layer.