Could be the model using a steam engine section to generate the smoke...not needed in OR, there is a smoke effects section that can be added to any caboose.wag file ( coded by Peter Newell ) ... so a separate VGN40.eng file is not needed.
Code:
Effects (
SpecialEffects (
WagonSmokeFX (
-0.80 4.3 -2.29
0 1 0
0.3 )
)
)
Here's the page giving examples of the various Open Rails steam and smoke special effects ( steamer_ctn web site Coals to Newcastle )
https://www.coalstonewcastle.com.au/...effects/#wagon