Phil:
The rigging was done by professionals, and not by me. I only bought the commercial package from them on Blender market. I decided to put in the investment on this because Trainz really needs a new generation of high quality animated people that my routes can use. The existing ones are starting to look rather dated in newer versions of Trainz. Now I am beginning to think I wasted my money on this, as I can't see to get from here to there, and don't have the animation expertise skills to do this myself from scratch. FYI I have tried through trial and error virtually
every setting one at a time on and off in Blender regarding armature, bones, pose, etc but with no change to the distortion problem.
As for the rigging, from what I can tell the rigging, which is pretty complex and detailed, appears pretty standard and follows guidelines for how to rig a mesh. The mesh animation works
perfectly in Blender, but as you can see from the video I posted on this it gets distorted in Trainz for some reason I cannot get an authoritative answer to from N3V. I have even provided the Blender file and everything else necessary to replicate the issue in Trainz. If only they would look at it and see for themselves.
Unless I get that answer, if I ever do, I guess I will just have to accept the monetary loss on this, give up, and move on.....
For more information on the package I purchased see:
https://blendermarket.com/products/population
Thank you for your attempts to help me.
Bob