The key characteristic that is featured in African rock paintings but is not present in European and Australian rock paintings is shading. The rock paintings of Africa feature complex and exquisitely minute details of shading.
Rock painting is one of the oldest art forms of Africa that is practised even today. The paintings depict human figures, animals and figures with both human and animal characteristics. Polychrome shading is very common in rock painting. This shading gives the painted objects a three-dimensional look and feel.
The camera obscura later became a popular tool during the Middle Ages and the Renaissance, particularly after inventors began using biconvex lenses to brighten its images. Astronomers used it to protect their eyes while observing the sun and solar eclipses, and artists employed it as an aid in portraiture and landscape painting.
The best way to shoot a picture would be to have it center screen. You can look through your viewer as well as long as your subject is the main focus in the middle.
