The Birth of Venus
Sandro Botticelli, c. 1482–1486
tempera on canvas
172.5 cm × 278.5 cm (67.9 in × 109.6 in)
Class notes from Drawing the Figure in Space with Elizabeth Rupprecht, SAIC, 1991
Look at feet & hands like Raphael or Botticelli:
Mark an X for direction.
With cubism, the grid should be 3D, not 2D.