Source code packages for rtVTK v0.6.0 are now available via the Downloads page. The packages contain the full source code implementation of the core components described in the i3D 2012 paper. The code is distributed under the BSD 3-Clause License; additional information is available in the README file.
Read-only access to the rtVTK development repository is also available via HTTP with git:
git clone http://www.rtvtk.org/code/rtVTK.git