Load new graphics for new signal types.
2.6 alpha 0 r1246 or later
Configuration file: newsignals on|off
Command line: -ZW
This switch enables the installation of new signal graphics files.
Most files, including ttdpbase[w].grf, do not require this switch, as they use an older, and less powerful, method of adding new signal graphics. Any GRFs that provide different graphics for restricted and programmable signals will require this switch.
This feature was contributed by Jonathan G. Rennison.