An experiment was done in one grid shaped street pattern and one irregularly twisted street pattern. There were two ways to memorize forms in the experiment: a real walk and CG animation presented walk through a fixed pathway. After memorizing the course.the subject walked the pathway by himself. The subjects were 25 males and 15 females. As a result of the sight behavior analysis, it became clear that the subjects who had undergone the walk course demon strated more intensive sight behavior toward the grid shaped street pattern than toward the irregularly twisted street pattern. However, the subjects who learned the course by CG animation demonstrated the opposite results: they showed a more intensive sight behavior toward the irregularly twisted street pattern than the grid shaped one.