Railway track and ballast ....

The scheme I settled on for track is to use standard OO/HO track pieces (secondhand pieces bought on Ebay and at Toy&Train fairs), on cardboard with a surface made of printed ballast effect paper.

a couple of sections done to try out the idea...

enough done to go diagonally across the game table...

If action for games ends up in UK (maybe part of the Professor in trouble series), then I have got a railway station and some suitable rolling stock

I will make up some more generic track pieces, curves, turnouts etc; then after that make any extra pieces up I need for specific scenarios.