Doom Map with green criss cross lines?

Hi, I new to Doom Builder; I was wondering what engines are used to make this type of map? How do you edit them? Thanks.

I'm not exactly sure what you mean by "Doom Map with green criss cross lines", or exactly how that relates to the question in the post. You might need to add a bit more detail to make it clear what you're asking about. Do you have a specific example of what you're trying to achieve?

Also note that R667 doesn't really deal extensively with map construction; we can give you some pointers on general use of Doom Builder 2, but you probably want to hit up the documentation on the official site if you're just getting started. Also note that Doom Builder 2 is essentially "discontinued" in favor of GZDoom Builder , so you may wish to start trying to familiarize yourself with that instead.