This paper proposes a hybrid 3-D modeling system that inherits advantages of both modeling on 2-D plane and modeling in 3-D space. To integrate 2-D and 3-D modeling environments into a single modeling space, we employ a slant rear-projection display as a drafting table that gives users 2-D constraints and provides a 3-D work place by using LCD shutter glasses. In the proposed system, users can perform several modeling operations both on 2-D plane and in 3-D space according to the nature of each operation. As a result, each operation in the proposed system becomes more powerful than those of conventional 3-D-CG softwares, so users can create complex models easily and efficiently.