This paper focused on the reliability of the virtual simulation system for the residential environment evaluation. Through the comparative experiments between virtual and actual space, brightness perception, space perception, length perception and a sense of reality were examined. In the virtual space the height and the width were well reproduced, while the depth could not be perceived so precisely. A sense of reality was influenced by the level of modeling and the way of texture maping, and it was found out that the level of modeling does not need to be unlimitedly raised up to get a high degree of reality.
