If you are looking for a direct continuation of the poster, your best bet would be to contact the author on his website.
It wouldn't be too hard to remake the models yourself as all the software is available out there for free. The author has used LDraw to view the models and POV-Ray to render them. You can find the details here.
Fortunately Eurobricks has a database of official sets designed by fans in LDraw.
However, there are only 1927 sets available (as of April 2015) and most of the train sets released after 2003 are not available.
There are 4748 sets designed using the LEGO Digital Designer (LDD) software. If you open a LDD file in LDD, you can export the file as an LDraw file. (File -> Export Model / Ctrl + E). Even with the most up-to-date LDraw parts library, you may find that not every LDD brick will be available in your LDraw model.
If you cannot find all the models in LDraw or LDD, you may be able to find the files created in other LEGO CAD software or you can recreate the models yourself using your favourite LEGO CAD software using the instructions (which should be available on the LEGO site).
LDD would probably be the best choice, as you can render the files using LDD2PovRay.