1.6.4535|Jul 29, 2025
View on Steam↗Update 1.6.4535 released
3/5 Moderate
RimWorld 1.6.4535 fixes critical Odyssey expansion issues including gravship power scrambling and shuttle losses, alongside a major overhaul of 'corner' interaction bugs.
Key Changes
- 1Fixed 'corner' issues where buildings and turrets could interact through diagonal walls, affecting room roles and fire spread.
- 2Resolved gravship launch bugs that scrambled electrical connections and reset flickable power states.
- 3Fixed player shuttles being lost to water and improved landing spot logic for gravships.
- 4Corrected a major Archonexus bug that prevented obtaining gravcores after a reset.
- 5Optimized startup performance for players using a high volume of modded content.
- 6Fixed diagonal walls incorrectly leaking room vacuum in space environments.
- 7Adjusted Psilocap breakdown and inspiration chances for better balance.
- 8Fixed alligator eggs incorrectly hatching into sea turtles.
- 9Resolved issues with the nomadic precept mood resetting upon loading a save.
- 10Fixed wolverines not being correctly identified as predators.
All Changes
🚀Odyssey & Gravships(11)
- changeGravship: Reduced the chance of the gravship landing spot being over deep water.
- fixGravship: Flickables are now reset to be powered on when a gravship launches.
- fixGravship: Fixed power connections being scrambled on gravship launch.
- fixGravship: Fixed pathfinder not updating areas previously occupied by gravships, causing pawns to walk over empty space.
- fixGravship: Fixed gravship hull being placeable off of substructure.
- fixGravship: Fixed roof overlay not updating after gravship leaves a grav-anchored map.
- fixGravship: Fixed roof zones being left on the map after gravships leave.
- fixGravship: Fixed gases on gravships never dissipating after landing.
- fixGravship: Fixed player not being considered to have a grav engine while the gravship is in flight.
- fixGravship: Fixed gravship overlapping prison cells for 'prisoner willing to join' quests.
- newOrbital Platform: Added flooring to subroom prefabs on orbital platforms.
⚙️Gameplay Systems(15)
- fixBuildings: Fixed corner punching turrets and buildings through corners affecting room roles.
- fixBeds: Fixed beds becoming prisoner beds through corners.
- fixEnemies: Fixed enemies being able to set fire to buildings through corners.
- fixWalls: Fixed diagonal walls incorrectly leaking room vacuum.
- fixShuttle: Fixed player shuttles being lost in water when landing.
- fixHospitality Quest: Prevented hospitality quests from being acceptable in space to avoid bugs.
- fixTraps: Prevented traps from spawning next to exterior doors.
- fixOutfit Stand: Prevented outfit stands from being uninstalled to prevent inventory destruction.
- fixNomadic Precept: Fixed nomadic precept resetting to poor mood on save/load.
- fixCombat: Fixed pawns taking friendly fire when standing on the same cell as another building (like doors) within safe range.
- fixAge Reversal: Fixed age reversal demand time not setting correctly from chronophagy and resetting on load.
- fixFishing: Fixed pawns not fishing if the closest water body has no fishable cells.
- fixGoodwill: Fixed tended goodwill being reset if a pawn is downed again after being tended.
- fixSlave Rebellion: Fixed slave rebellion triggering while a slave is in a gene extractor.
- fixCombat: Fixed pawns with ranged weapons missing the melee attack float menu option when in melee range.
⚖️Balance & Traits(5)
- buffPsilocap: Reduced psilocap catatonic breakdown chance from 4% to 1%.
- nerfPsilocap: Reduced psilocap creative inspiration chance from 6% to 2%.
- buffBreathless Gene: The breathless gene now suppresses the normal vacuum resistant gene, removing its metabolic impact.
- changeGravcore: Gravcores are no longer requested in trade request quests.
- fixSentience Catalyst: Training decay time now correctly accounts for sentience-catalyst-adjusted wildness.
🗺️Quests & Map Gen(15)
- fixShuttle Crash Quest: Fixed shuttle crash quest issues after moving maps.
- fixMechanoid Signal Quest: Fixed mechanoid signal quest sometimes failing to drop the grav engine.
- fixCraters: Fixed Odyssey craters being unable to be filled without Anomaly enabled.
- fixLava: Fixed lava emergence causing freezes in specific circumstances.
- fixGrav Engine: Reduced the possibility of obtaining a double grav engine.
- fixStrange Signal Quest: Fixed strange signal quest disappearing if the target map is destroyed.
- fixStrange Signal Quest: Fixed strange signal quest being acceptable in space.
- fixShuttle: Improved fallback for spawning shuttles on maps from caravans.
- fixShuttle: Shuttles now properly apply peace talk outcomes on landing.
- fixArchonexus: Fixed Archonexus reset failing to reset grav engine inspected status, preventing further gravcore acquisition.
- fixAncient Mechanitor Complex: Fixed ancient mechanitor complex failing to generate on maps where it should fit.
- fixAncient Reactor: Fixed map generation exception if the ancient reactor fails to find a spawn location.
- fixQuests: Fixed quest pawn arrival breaking in space.
- fixBestower Quest: Fixed error when accepting bestower quests.
- fixAncient Exostrider: Fixed abandoning a map with an ancient exostrider not counting as abandoning the mechanitor chance.
🐾Entities & Environment(7)
- fixWolverine: Wolverine is now correctly configured as a predator.
- fixAlligator: Fixed alligator eggs hatching into sea turtles.
- fixCypress Tree: Fixed cypress trees being destroyed by floodwater unlike other trees.
- fixSentience Catalyst: Fixed unnatural healing and healer serums removing the sentience catalyst.
- fixSentience Catalyst: Fixed sentience catalyst being able to target wild people.
- fixApocriton: Fixed Apocriton missing parts for heavy shield apparel.
- fixEnemies: Enemies in Odyssey structures now respond better to unreachable colonists.
👁️UI & Visuals(10)
- changeCraters: Made crater descriptions more generic.
- changeOrbital Scanner: Clarified the orbital scanner description.
- changeGravcore: Clarified the gravcore description.
- changeRituals: Made ritual text more generic to fit more situations.
- changePlayer Names: Updated some player names per request.
- fixUI: Fixed draw styles using area instead of selected cell number.
- fixUI: Fixed UI cascade error when a pawn targeted with 'skip' dies.
- fixStatue: Fixed statue not visually updating after using 'transmute steel' until reload.
- fixUI: Fixed incorrect message when trying to set a prisoner as a pilot.
- fixUI: Fixed various typos in plant grove, mechhive, and lava snail descriptions.
💻Technical & Performance(7)
- changeModding: Removed unnecessary PawnRenderNode_Apparel cast in Apparel dynamic setup for modders.
- fixPerformance: Fixed slow startup performance (InitializeShortHashDictionary) with large amounts of modded content.
- fixTechnical: Fixed orbit layer not using correct world size when loading into existing 1.6 saves.
- fixTechnical: Fixed incorrect index calculations in river flow code.
- fixTechnical: Fixed record-related errors when loading non-Biotech saves with Biotech enabled.
- fixLinux: Fixed Linux build not inheriting launch arguments configured in Steam.
- fixTechnical: Fixed apparel setup not passing parent tag def into render node.
Summary
Odyssey Expansion Fixes
This update focuses heavily on stabilizing the Odyssey expansion content. Key fixes address gravship launches scrambling electrical connections, shuttles being lost when landing in water, and pathfinding issues where pawns would walk over empty space previously occupied by ships.
Gameplay & Corner Logic
A significant set of fixes addresses 'corner' interactions, preventing turrets from punching through corners, enemies setting fires through diagonal walls, and room roles being incorrectly assigned due to corner gaps.
Balance & Technical Improvements
Balance adjustments have been made to the Psilocap and Breathless gene. Technical improvements include optimized startup performance for heavily modded games and fixes for Linux launch arguments.