Color Theory Crash Course by *pronouncedyou on deviantART by anne.lindell.9
ATPM 9.09 - Quick Tips in Design: Part 3: The Illusion of Depth
explains 1, 2 and 3 point perspective really well
church spire, perspective and architecture, drawing in perspective
Find out what cross contours are and how to use them to make your drawing more three-dimensional. Understanding cross contours is important for any style of drawing.
Step BB StylesofPenLining Drawing in Pen and Ink : Techniques for Pen Drawing
Study of still life using pen and ink
Virgin Bodies 14 by ~FVSJ on deviantART via PinCG.com