The current version of YafaRay4tS is version 0.7.0 and can be downloaded directly from this website here:
(for trueSpace 7.61)
(for trueSpace 7.61 Workspace Only version)
To make use of YafaRay4tS you will need to already have trueSpace 7.6 or later and the Windows version of YafaRay 1.0 installed.
YafaRay is available at the YafaRay.org website.
TrueSpace can be downloaded for free directly from Caligari Corporation.
Note: When the YafaRay4tS installer prompts you for an install directory, make sure you choose your TrueSpace install directory otherwise YafaRay4tS will not install properly. If you need further help with the installation visit the installation section of the help page.
Release notes for the current release can be found here.
Older versions of YafaRay4tS can be found here.
For people having trouble with the exe installer and would prefer to install YafaRay4tS manually, a zip archive of the YafaRay4tS files can be found here.