title: Are there any version control systems for 3d models / 3d data?
body: <p>Well the subject is the question basically. Are there any version control systems out there for 3d models. An open source approach would be preferred of course.</p>
  
  <p>I am looking for functionality along the lines of subversion however more basic systems would be of interest as well. Basic operations like branching / merging / commit should be available in one form or another. </p>
  
  <p>UPDATE: With open source approach I don't mean free but the option of heavily expanding and customizing the system when needed</p>
  
  <p>UPDATE2: I don't know how to describe this in the best way but the format of the 3d model is not that important. We will be using IFC models and mostly CAD programs. The approach Adam Davis describes is probably what I am looking for.</p>