Yeah...Thats beach sand and they will wash away from the waves or if it rains....:hehe: ......Maybe you could run G scale on there and that might be ok :hehe:.....N scale would be the BEST
Actually, if you as simply as look at the title you can see Trainz is not all about imagination. Trainz Railroad Simulator.
And in answer to your question, read the manual...
:wave: