Light source, that is what direction the light is facing, also take care with shadowing. Just copy down into the sketch book you have at hand as accurately as possible.
The end of which there were two little sketches of rhetoric and logic, the latter finishing with a specimen of a dispute in the Socratic method.
I like to take my pad and pencil and drive to the seashore to sketch.
The police asked the girl to make a rough sketch of her lost dog.
He begins to sketch no matter where he is.
This project grew out of a sketch I made on a napkin at a party last year.