This thread is a no-no. The characters shown here are copyrighted to their copyright holders, such as Nintendo for Mario. Any work that reproduces them, whether a self-made drawing, photograph of a figurine or statue of them, or 3D model, is a derivative work, and must be authorized by the copyright holder of the character reproduced before it can be distributed.
So distributing 3D models of these characters, whether for Trainz or not, is copyright infringment unless permission is granted from the copyright holders of the characters in question. Even just posting screenshots of them without permission is likely also a copyright infringment.
Per the above reasons, perhaps it would be a good idea for a moderator to lock or delete this thread.
Regards,
Retro.