[Other] World Map Editing

[esipode]

I've been trying to insert new world maps in FireRed.
Using Neti's guide I was able to successfully replace the Kanto map. However, I can't find any way to edit the Sevii Islands. They don't appear to be available in UNLZ, and nobody seems to know the offsets for their tilesets or tilemaps.

Have I just been looking in the wrong places for information? Is this common knowledge?

 

[Squeetz]

I've been trying to insert new world maps in FireRed.
Using Neti's guide I was able to successfully replace the Kanto map. However, I can't find any way to edit the Sevii Islands. They don't appear to be available in UNLZ, and nobody seems to know the offsets for their tilesets or tilemaps.

Have I just been looking in the wrong places for information? Is this common knowledge?

They all use the same tileset.
Tilemap locations, from LU-HO:

Spoiler:

$3F089C - Kanto
$3F0AFC - Sevii Isle 1-3
$3F0C0C - Sevii Isle 4-5
$3F0CF0 - Sevii Isle 6-7

 

[esipode]

They all use the same tileset.
Tilemap locations, from LU-HO:

Spoiler:

$3F089C - Kanto
$3F0AFC - Sevii Isle 1-3
$3F0C0C - Sevii Isle 4-5
$3F0CF0 - Sevii Isle 6-7

Thank you for the explanation!

So if I needed to replace all 4 maps, I would need a tileset that contains all 4 maps I intend to insert?

 

[Squeetz]

Thank you for the explanation!

So if I needed to replace all 4 maps, I would need a tileset that contains all 4 maps I intend to insert?

You'd need to cram all 4 maps into one tileset, yes.
In vanilla, this tileset has to be 128x160.

 

[esipode]

Okay, everything worked and I have my 4 custom maps! Hooray!

Now, I have a tangentially related problem. (I didn't want to make another thread just for this since the topic is still the same.)

I have expanded the maximum number of map names that the game uses from 109 to 197 using THIS TUTORIAL.

It all worked flawlessly, with one tiny hitch. I have no idea what I'm supposed to change the "limiter bytes" to? Every value I set them to seems to affect nothing in Advance Map. I open up the world editor and it doesn't allow me to place any maps before 0x58 or past 0xC5.

 

[TheSnowPeople]

In my hack, I have managed to insert a new map over the first Sevii Isles map, but it breaks the game when opened if I add more than four towns. Any ideas?

 

[Pyxal]

In my hack, I have managed to insert a new map over the first Sevii Isles map, but it breaks the game when opened if I add more than four towns. Any ideas?

Go to a backup and use HMA to edit the Worldmap's.