1. A storage medium storing an image processing program of an image processing apparatus including an operator, said image processing program causes a computer of said image processing apparatus to function as following means: an image outputter which outputs an image obtained by imaging a virtual three-dimensional space with a virtual camera; a condition determiner which determines whether or not a predetermined condition is satisfied; a two-dimensional surface generator which generates a two-dimensional surface in said virtual three-dimensional space when it is determined that said predetermined condition is satisfied; and a depicter which depicts a two-dimensional image on said two-dimensional surface in accordance with an operation by said operator.