A burnt umber underpainting can have up to seventeen layers of glazing. There are several different types of underpainting, such as veneda, verdaccio, morellone and grisaille. Then comes underpainting, overpainting, and finally semi-transparent glazes and varnish. Parrish usually used a blue and white monochromatic underpainting. An ochre for example has an underpainting in a bright yellow. The underpainting or drawing of the painting will become visible with IR radiation. There is a popular misconception that underpainting should be monochromatic, perhaps in gray-scales. Casein paint is reworkable and can be used for underpainting. Another source is the "underpainting" techniques of the Mexican muralists painters. He used extensive underpainting in his oils, thereby creating subtle effects. She continued experimenting with various techniques such as using different types of underpainting. The underpainting was finished in 1944, and the mural finally completed in June 1947. Other techniques include "underpainting" and "scraping down" or sgraffito. If underpainting is done properly, it facilitates overpainting. The underpainting reveals a female head wearing a turban, oriented towards the viewer.