Do the right thing
I have read the book" Drawing with the right side of the brain" with great interest. It´s an amazing book that gave me many insights about drawing and perceiving. Betty Edwards means that everybody can draw, it´s just a matter of learning it with the right guidance and instructions. And I believe her after have seen the examples in her book, -the before and after drawings of self portraits by different students.
In the book she sais: "All drawing is the same, broadly speaking, always involving the same ways of seeing and the same skills.
In the book she teaches the reader the five perceptual skills of drawing:
1. The perception of edges
2. The perception of spaces
3. The perception of relationships
4. The perception of lights and shadows
5. The perception of the whole
All skills mainly held by the right hemisphere.