Impossible Shapes
Drawing An Impossible Triangle
Here's how you can draw The Penrose Triangle, an example of an impossible shape.
Drawing Knots, Level 3
How to draw the final version of the twisty Henri Matisse knot!
Drawing Knots, Level 2
How to draw a more complex version of this twisty Henri Matisse knot!
Drawing Knots, Level 1
How to draw a simple version of this twisty Henri Matisse knot!