Hello, I am new here but I have been playing OTTD for quite some time now
I love this feature!
I have a question:
Is it possible to create a template that would replace only wagons
for all trains in a given group? Let's say I have a train that has an obsolete engine which is not available anymore
and I want to keep that engine
and just remove or add wagons according to the template. Is it possible to do that somehow?
that is possible, but you need to have an existing template which contains this obsolete engine.
You can always create a new template from an existing train by cloning it, so if you have some train with the old engine, you should be able to create a template containing the old engine.
You can then modify it to contain the new model wagons. Just select the template from the list and click "Delete last engine" to remove the old wagons from the template, select a new type of wagon from the engines list on the left and click "Add engine" to add it to the selected template.
With that template you can keep the old loco around.
I just tried to test it but couldn't because the old engines wouldn't expire when I cheated the date from 1900 to 2050... I tried with the default engine set and with the UKRS 2.0 train set. Do you have an example of a newgrf where the engines are set to expire?