Sistine Chapel ceiling how the work progressed. It was customary for fresco painters to use a full-sized detailed drawing, a "cartoon", to transfer a design onto a plaster surface—many frescoes show little holes made with a stiletto, outlining the figures. Here Michelangelo broke with convention; once confident the "intonaco" had been well applied, he drew directly onto the ceiling. His energetic sweeping outlines can be seen scraped into some of the surfaces, while on others a grid is evident, indicating that he enlarged directly onto the ceiling from a small drawing. Michelangelo painted onto the damp plaster using a wash technique to apply
Sistine Chapel ceiling cleanly defined outlines make each subject easily visible from the floor. Despite the height of the ceiling, the proportions of the "Creation of Adam" are such that when standing beneath it, "it appears as if the viewer could simply raise a finger and meet those of God and Adam". Vasari tells us that the ceiling is "unfinished", that its unveiling occurred before it could be reworked with gold leaf and vivid blue lapis lazuli as was customary with frescoes and in order to better link the ceiling with the walls below it which were highlighted with a great deal of