I have noticed a few don't, but everyone has them.
in:
C:\Program Files (x86)\Steam\steamapps\common\railworks\dev\Shaders
copy 2 files, ShaderDesc.txt and App.fbk into your 3DS max plugcfg folder. (the one in users)
C:\Users\RSderek\AppData\Local\Autodesk\3dsmax\2011 - 32bit\enu\plugcfg
The last shader in the kuju list should be: TrainShadowOnlyDiffuse.fx
regards
Derek