Then just set climate availability to 'all' for all vehicles...Snail wrote:I don't know how convenient it would be to keep the three versions in one GRF file, to be chosen through a parameter.
The tropic one would be a totally different set, with just some freight wagons as overlap. The Alpine one would be a subset of the existing one, with a more limited choice of liveries for the available vehicles.
I still haven't explored to what extent adding a parameter would complicate the code. Honestly my priority now is to get at least the temperate version done (and my TTD time is sonewhat limited...)
Having done a parametrized version of a train grf wrt climate availability, it's simple to do, though. If done right.