# RimWorld Update 1.6.4528 released - Product: RimWorld (https://whatsnew.fyi/product/rimworld) - Vendor: Ludeon Studios - Date: 2025-07-22 - Original notes: https://store.steampowered.com/news/app/294100/view/498327545507219356 - Permalink: https://whatsnew.fyi/product/rimworld/releases/2025-07-22-update-1.6.4528-released What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog. Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'. --- - **fixed** — Remove the soaking wet thought penalty when swimming for recreation - **changed** — Reduce cover effectiveness of passenger shuttle - **changed** — Animals specialist now increases fishing speed and fishing yield - **changed** — Make fungus preferred precept compatible with the darkness meme - **changed** — Reduce caravan movement difficulty and disease occurrence in the glowforest - **removed** — Remove HP from gravcores to prevent accidental destruction - **changed** — Hermit crabs now hide in their shell when not moving - **fixed** — Disable gravship landing on worshipful village - **fixed** — Prevent opening the world map during gravship cutscene - **changed** — Clarify basic gravtech description - **changed** — Clarify how gravship substructure is removed - **added** — Add remove foundation option to the floor architect category - **fixed** — Fix psilocaps to correctly have a small chance to inspire colonists or induce a catatonic state when consumed - **changed** — Make vultures more resistant to rot stink and other environmental toxins - **fixed** — Fix rain sometimes appearing pixelated - **fixed** — Fix pawns left behind with a grav anchor losing their allowed areas - **fixed** — Fix bluebird eggs hatching into crows - **fixed** — Fix inability to repair conduits through blocked corners - **fixed** — Fix inability to extinguish fires on walls that are only diagonally reachable - **fixed** — Fix shuttle mass not updating when using unload all gizmo Hello! It’s been almost 2 weeks since Odyssey came out, and we’ve been hard at work fixing bugs and incorporating your feedback. If you’d like to help us by reporting a bug, please join the **[official RimWorld development Discord](https://discord.gg/MC6eYAHuPu)**. Today’s update has improvements and fixes for RimWorld, Odyssey, and the other expansions. This includes things like removing the -3 soaking wet thought when swimming for recreation and reducing memory usage overall. This update should be compatible with all savegames and mods. P.S. Send us your gravships on X or BlueSky by mentioning the @LudeonStudios account! - Tia (https://ludeon.com/blog/) | (https://x.com/LudeonStudios) | (https://bsky.app/profile/ludeonstudios.bsky.social) | (https://www.reddit.com/r/RimWorld/) | (https://www.facebook.com/LudeonStudios/) ##### Changelog - When consumed, psilocaps now correctly have a small chance to inspire colonists or induce a catatonic state, matching their in-game description. - Vultures are more resistant to rot stink and other environmental toxins. - Reduced cover effectiveness of passenger shuttle - Animals specialist now increases fishing speed and fishing yield. - "Fungus preferred" precept is now compatible with the darkness meme, allowing more options in glowforest. - In the glowforest, reduced caravan movement difficulty and disease occurrence. - Removed HP from gravcores to prevent them from being accidentally destroyed. - Hermit crabs now hide in their shell when not moving. - Disabled gravship landing on worshipful village. - No longer possible to open the world map during the gravship cutscene. - Clarified the basic gravtech description. - Clarified how gravship substructure is removed. - Added “remove foundation” to the floor architect category. - Updated some player names per request. ##### Performance - Performance improvements in the glowforest. - Improved load times on Mac. - Add debug checks to strip out several heavy profilerblocks. - Improvements to world pawn GC algorithm, and debug tools for logging world pawn information. - Fix: Significant performance drop when the world map is open. - Fix: Higher-than-necessary memory usage during texture atlas baking (causing memory issues with lots of mods). - Fix: Bad performance in royal title quest when throne room isn't enclosed. - Fix: Significant performance drop when the terrain tab on the world map is open. ##### Fixes - Fix: Gaining soaking wet thought when swimming for recreation. - Fix: Rain sometimes appears pixelated. - Fix: Pawns left behind with a grav anchor lose their allowed areas. - Fix: Added fallback check to prevent obtaining multiple grav engines from mech signal quest. - Fix: Interior courtyard loot rooms could generate cutoff. - Fix: Typo in Odyssey AncientOrbitalCorridor def name. - Fix: Ancient garrison corridor spawning life support units. - Fix: Possible exception in quest info if player silent faction is null. - Fix: Rare pathfinding exception with missing faction. - Fix: "Type does not have a method named LoadDataFromXmlCustom, but we are trying to create a parser for it using that method." - Fix: Mechhive assembler last raid tick not saved. - Fix: Bluebird eggs hatch into crows. - Fix: Issue with modded statues due to xenotype being set before kindDef. - Fix: Can't repair conduits through blocked corners. - Fix: Can't extinguish fires on walls that are only diagonally reachable. - Fix: Gravship rotation code not respecting default placing rotation of modded content. - Fix: Fire on full impassable edifices exposed to vacuum not decaying. - Fix: Error when trying to enter pocket map with no home map. - Fix: Shuttle mass doesn't update when using “unload all” gizmo. - Fix: Collection modified error on gravship launch. - Fix: Possible to have gravcore subquest fire while in flight. - Fix: Potential fix for trader stock getting cleared. - F _[Truncated at 4000 characters — full notes: https://store.steampowered.com/news/app/294100/view/498327545507219356]_