Abstract
We can image some objects that cannot exist. For example, M.C. Escher drew some "impossible objects" in his works, which we can see as "real objects" despite those cannot be created in real. If we can express imaginable objects as impossible objects, that will extend our creation potential. In this thesis, we propose techniques that create illusion expression by combining several image buffers in real time, and describe those algorithms and sample works. Using those techniques, it is able to show impossible objects as real objects and depict temporal-spatial distortion objects. Those methods are planar process that only combining images using pixel information. Nevertheless, we obtain expressions like using depth information.