1. An image processing method which generates a picture obtained by viewing an object existing in a virtual three-dimensional space from a predetermined viewpoint in the virtual three-dimensional space, the image processing method comprising: a step of displaying a screen consisting of a three-dimensional model which contains the viewpoint and is provided between the viewpoint and the object; a step of displaying a predetermined image on the screen; and a step of generating an image obtained by viewing the object from the viewpoint through the screen.