I'm playing SC4 on my Mac through Steam. Having just got NAM working, for the most part, it looks like newly built normal railroad tracks are missing their texture. It shows up as brown blocks when dragging to choose where to build, and shows as grass after building. Help!
That happens if you switch between Default rail and RealRailway (RRW) from the NAM. Re-run the NAM installer and either select or unselect RRW as desired and the problem should go away.
That worked. Thanks!