TL;DR
Add a route-override button to the train UI to auto-route a train to an arbitrary station and then drop to manual mode.

What ?
Unless I've missed something: We have manual train mode, where you control the moment-to-moment driving of a train. We have automatic train mode, where you set up ...

Hmm... Killing the process is a bit heavy-handed, but should be workable, assuming the killed Factorio doesn't leave "droppings" about...

I was able to use on_tick to do a screenshot on startup. But what would be nice now, is a way to *end* the game at that point and either load the next save to be "screenshotted" or exit factorio completely to let a new instance be started for the next save.

I'm looking to put together a tool to make a large scale segmented "screenshot" directly from one or more save files, batch-style. I've seen the mods/scripts that will generate such things, but the conventional way to invoke them is to be playing the game and then enter a command / push a button ...