{"id":98979,"date":"2026-06-05T19:29:22","date_gmt":"2026-06-05T16:29:22","guid":{"rendered":"https:\/\/vpesports.com\/minecraft\/mods\/mc-249136-fix\/"},"modified":"2026-06-05T19:29:22","modified_gmt":"2026-06-05T16:29:22","slug":"mc-249136-fix","status":"publish","type":"mod","link":"https:\/\/vpesports.com\/minecraft\/mods\/mc-249136-fix\/","title":{"rendered":"MC-249136 Fix"},"content":{"rendered":"\n\n
\n

## **NOTICE**<\/p>\n

MC-249136 appears to have been fixed in newer versions of Minecraft! As such, I’ve decided not to update this mod for 1.20.5-onwards.<\/p>\n

If you still encounter problems with treasure maps in 1.20.5+, please create an issue to let me know!<\/p>\n<\/td>\n<\/tbody>\n<\/table>\n

# MC-249136 Fix<\/p>\n

![Requires Fabric API](https:\/\/modrinth.com\/mod\/fabric-api)
\n![Available on GitLab](https:\/\/gitlab.com\/horrific-tweaks\/MC-249136)
\n![Available on Modrinth](https:\/\/modrinth.com\/mod\/mc-249136-fix)<\/p>\n

This mod implements a minimal hacky fix for MC-249136, a significant server lag spike that occurs when locating buried treasure structures for shipwreck loot.<\/p>\n

To avoid this lag spike, structure location is moved into a separate thread that does not block the server tick loop. This does nothing to improve the structure location performance, but it does at least prevent it from significantly impeding gameplay.<\/p>\n

![An empty Minecraft buried treasure map, with the text “Loading” in the center](https:\/\/gitlab.com\/horrific-tweaks\/MC-249136\/-\/raw\/main\/screenshot.png?v=1)<\/p>\n

## Configuration<\/p>\n

The map “loading” images can be customized by placing `128×128` PNG files in `\/config\/mc249136\/map_loading.png` and `\/config\/mc249136\/map_not_found.png`.<\/p>\n

For performance reasons, these images will draw all pixels as black unless they are fully transparent (i.e. `rgba(0,0,0,0)`). Minecraft’s map color palette is difficult and expensive to calculate – so this mod literally just does an `if (rgb != 0)` to draw the image.<\/p>\n

Known issues:
\n– This mod does not handle state persistence, and only updates loaded maps once they are inside a player’s inventory.
\n This means that it is possible to prevent a treasure map from loading by breaking the chest, leaving it in item entity
\n form, and then restarting the server.<\/p>\n","protected":false},"excerpt":{"rendered":"

A hacky fix for server lag spikes when generating shipwreck buried treasure map \/ explorer map loot.<\/p>\n","protected":false},"featured_media":98980,"template":"","meta":{"_minecraft_slug":"mc-249136-fix","_minecraft_project_id":"QzMW0gl4","_minecraft_author":"fennifith","_minecraft_license":"LGPL-3.0-only","_minecraft_downloads":74148,"_minecraft_follows":50,"_minecraft_client_side":"unsupported","_minecraft_server_side":"required","_minecraft_storage_type":"zip","_minecraft_archive_name":"mc-249136-fix.zip","_minecraft_size_bytes":53912,"_minecraft_version_count":3,"_minecraft_updated_at":"2026-05-16T01:25:33.650497Z","_minecraft_date_created":"2023-08-14T07:48:54.427537Z","_minecraft_date_modified":"2023-12-09T23:25:47.551829Z","_minecraft_project_url":"https:\/\/modrinth.com\/mod\/mc-249136-fix","_minecraft_icon_attachment_id":98980,"_minecraft_imported_at":"2026-06-05T16:29:24+00:00","_minecraft_import_hash":"846cbc37a9179b9f225260ba2ebedd8f","_minecraft_versions":"","_minecraft_links":"","_minecraft_gallery":"","_minecraft_api_metadata":""},"mod_category":[97,90,98,92],"mod_loader":[99,100],"minecraft_version":[54,55,56,57,58,59,36,60,93,94],"class_list":["post-98979","mod","type-mod","status-publish","has-post-thumbnail","hentry","mod_category-fabric","mod_category-optimization","mod_category-quilt","mod_category-utility","mod_loader-fabric","mod_loader-quilt","minecraft_version-1-19","minecraft_version-1-19-1","minecraft_version-1-19-2","minecraft_version-1-19-3","minecraft_version-1-19-4","minecraft_version-1-20","minecraft_version-1-20-1","minecraft_version-1-20-2","minecraft_version-1-20-3","minecraft_version-1-20-4"],"yoast_head":"\nMC-249136 Fix - 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