In this paper we present a novel interactive modeling system, called VR Modeler, to create 3D geometric models from a set of photographs. In our approach standard automatic reconstruction techniques are assisted by a human operator. The modeling system is efficient and easy to use because the user can concentrate on the 2D segmentation and interpretation of the scene whereas our system is responsible for the corresponding 3D information. Therefore we developed the user interface of VR Modeler as a monocular 3D modeling system. Additionally, we are able to obtain coarse as well as high resolution models from architectural scenes. Finally, we tested the modeling system on different types of datasets to demonstrate the usability of our approach.