This paper presents VEX-CMS, a tool to build 3D virtual museums and exhibitions, architectural walkthroughs and, more generally, applications where 3D and 2D content is presented to the user inside a 3D Virtual Environment. In this paper, we concentrate on the task of designing tours of the virtual environment to be followed by visitors, either through manual or automatic navigation, and show how a recent automatic camera control approach [3], coupled with path planning, can be exploited to accomplish the task with minimal knowledge and manual effort on the curator’s side.