map-gen-settings.json in single user mode?

[bobDoesThings]

I'm trying to generate a map outside the normal UI parameter range, so I renamed the example to map-gen-settings.json and made some changes, but I cannot seem to entice Factorio to recognize that. This is on a Mac with Steam. I've seen reference to this file for server Factorio and I'm starting to wonder if just doesn't get used in single player. Any ideas?

[Hornwitser]

map-gen-settings.json need to be specified with the --map-gen-settings command line option and is used in conjunction with the --create to create a save from the command line. i.e. you would be running something like this from a terminal:

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$ path/to/factorio-executable --map-gen-settings path/to/map-gen-settings.json --create path/to/save-to-create.zip

[bobDoesThings]

thanks - I finally figured this out.