Forming a base

I want to better understand how form develops. Form will be divided into four groups, knowing that we're really viewing on a continuous scale:

• Highlight
• Local Color
• Half Tone
• Shadow

We'll use Leonardo's Ginevra de' Benci based on this high resolution image from Wikipedia.

Next I need to spend some time with Photoshop, clipping out pieces for study in b/w and color. More soon!