Here is a link to a short film I made to document a drawing experiment.
A group of students were asked to describe objects of their choosing. The artist could not see these objects. The students were asked to describe the objects in terms of eternal or platonic forms: spheres, cubes, cylinders, cones etc. The artist then drew from these descriptions. No allusion could be made to the purpose or colour of the object, and only when the drawing was complete could the object be revealed. Five examples of this process are shown in the film.