[Bug]: Maps with terrain deeper than -64 do not automap correctly after world pregen - 1.21.1-6.0.0-beta.28

[brendenhoffman]

What happened?

I have tried this with multiple 2048 world height mods/ data packs and if it extends the underground depth it seems that it will not automap correctly after pre generating chunks. I have tried a data pack for just increased build height, bottom stays at -64, it generated fine. However, the mod I am trying to use in my pack, Shattered World Limits -512, does not generate correctly. I tried a random data pack, Almost No Build Limits, with a depth of -1024, to confirm and had the same result. If you need the results I will try to do something shallower like -128 and use a clean mod pack, but my pack did seem to work with it disabled.

Here is how it looks:

Mod Loader

NeoForge

Minecraft Version

1.21.x

Version

other (please list)

Relevant log output

journeymap.log

latest.log

[mysticdrew]

Couple things so I can replicate this on my end, Please provide links to any mods or datapacks used to generate your world with step by step instructions please.

[brendenhoffman]

The easiest thing for you would be to load ANBL, hopefully that alone gets you results as it did for me.

However I use SWL, but it is bugged and you have to extract the data pack from the mod and load it through the data packs interface. I didn't make a new data pack for this, I kinda just threw the files in another data pack for the nether lol. I am also using Terralith, terratonic, and Continents. That is the main world gen. I have tested with both chunk-pregenerator and chunky.

You should just be able to install the data packs easily with something like Global Packs, make a world, pregen a little outside your render distance, relog, and auto map. With a very small pregen radius it will probably be almost unchanged from your render distance, mostly black with maybe one or two mapped chunks. I think the picture I took was 75 chunks.