Before Continuing:

• Check you are using the latest version of the mods and its dependencies
• Always include a latest.log if you are crashing
• Remove mod that enhances Minecraft: Optifine, Sodium, others. The issue persists.
• If you are unsure which mod is the culprit.
  Disable all of your mods and enable them 1-2 mods each time to isolate the culprit
• Confirm that there is no existing issue with a similar description submitted in the list of issues.

Version

1.20.1-FORGE

Supplementaries Version

1.20-2.8.17

Moonlight Lib Version

forge_1.20-2.12.6

Issue Detail

Cartographer's Quills produce maps with the target structure marked at the correct location, however the map marker is incorrect, such as when creating a map for a buried treasure (/loot give @s loot minecraft:chests/shipwreck_map to test):

The expected marker should be the red "X" used in vanilla buried treasure maps.

I have also been unable to use a resource pack to override the "generic_structure" texture at supplementaries/textures/map_marker to rectify this for just buried treasure maps, nor have I been able to use /give to give myself a quill that has NBT that changes the map marker (though I'm not sure if this is a feature or if structures are hardcoded to link to specific markers).

However, running /give @s supplementaries:cartographers_quill and using the quill seems to correctly identify the marker of found nearby structures, so this could be an issue specifically with buried treasure maps, or quill NBT entirely.

(Quark version: 4.0-458)
(Zeta version: 1.20.1-1.0-19)