Fallout 2 Modding - Exit Grids in Detail

In this episode I cover just about everything there is to know about Exit Grids and how they work. I also discovered a number of situations that crash the mapper when using "Game Mode" to test exit grids.
While making this video I did my best to document as many of these crashes as I could so you could see exactly what causes them, but the easiest workaround is simply to test exit grids (and probably most map changes) in the game itself.

Links:
Description of the MAPS.TXT settings:
https://falloutmods.fandom.com/wiki/MAPS.TXT_File_Format

Description of the CITY.TXT settings:
https://falloutmods.fandom.com/wiki/CITY.TXT_File_Format

Other informative links with Exit Grid and Mapping info:
https://falloutmods.fandom.com/wiki/Exit_grids
https://falloutmods.fandom.com/wiki/Adding_maps
https://falloutmods.fandom.com/wiki/Worldmap,_Maps_and_City_text_editing_guide

Extracting and copying system files to the Fallout 2\data folder (direct link to timestamp):
https://youtu.be/vCPc1gxPtKk?t=438

How to change game speed in sFall (direct link to timestamp):
https://youtu.be/_0iKAH2kiQ4?t=585

0:00 - Intro
0:17 - Only Green Exit Grids Work
0:42 - Only 1 Exit Grid Hex does anything
1:00 - Toggle the Hex button to see a blue highlight on the Exit Grid
1:27 - Copy command to make a large Exit Grid
1:45 - Setting an Exit Grid to point to a Town Map
4:00 - MAPS.TXT
6:55 - Set Exit Grid Data and Mark Exit Grids
9:15 - World Map (Brown) Exit Grids
10:25 - Mapper Crashes part 1
11:30 - CITY.TXT
19:35 - MAP.MSG - or - how to fix the Town Name
22:10 - Pip-boy Auto-map Exit Grid Markers
22:47 - Mapper Crashes part 2
24:20 - The Invisible Maze