1.5.9|May 27, 2026
View on Steam↗Patch 1.5.9f1 - Morning Dew
2/5 Minor
The Morning Dew update improves vehicle pathfinding logic and shadow rendering while adding new UI customization for zone grids.
Key Changes
- 1Improved vehicle pathfinding with earlier lane selection and fewer unnecessary U-turns
- 2Significant shadow rendering fixes to address distance artifacts and flickering
- 3Added zone cell grid and border customization sliders to the UI
- 4New build menu filters for Region Packs and asset mods
- 5Fixed critical bugs in the City Stations Creator Pack including bus lane directions and unlock criteria
- 6Improved mod loading stability with background processing at launch
- 7Fixed electricity cost calculation bug where water fees were ignored
- 8Resolved Editor bug where custom terrain/water broke autosaving
All Changes
🚗Gameplay(7)
- buffVehicles: Vehicles now make fewer unnecessary U-turns during navigation.
- buffVehicles: Vehicles now choose their turn lanes earlier when approaching highway exits or intersections.
- fixElectricity: Fixed a bug where citizens and companies incorrectly used the electricity fee instead of the water fee for electricity cost calculations.
- fixTransportation: Fixed a game crash occurring when interacting with DLC transportation lines in vanilla game sessions.
- fixCoal Power Plant: Fixed an issue where the Coal Power Plant was unable to dispatch vehicles to purchase coal.
- fixDelivery trucks: Delivery trucks now properly exit specialized industry buildings like farms to export stock, preventing cargo pile-ups.
- fixNatural resources: Natural resources now deplete at the intended slower rate when playing on Easy mode.
👁️Visuals(4)
- fixShadows: Fixed shadow rendering distance jumping toward the horizon when tilting the camera.
- fixShadows: Fixed shadows being cut off at screen edges when zoomed close to the ground.
- fixShadows: Fixed uneven shadow cascade distribution that caused quality drops near the camera.
- fixTree shadows: Slightly improved tree shadow flickering during sun movement while the simulation is running.
🖥️UI/UX(11)
- newZone cell grid: Added zone cell grid and zone cell border color/transparency sliders for better customization.
- newBuild menu: Added ability to filter assets from Region Packs and asset mods within the build menu.
- buffRoad tools: Tool parameter values like road elevation now persist when switching between related tools.
- fixEducation overlay: Education overlay now displays the correct number of eligible students for Elementary Schools.
- fixUI: Fixed UI disappearing when specific zoned buildings were constructed on road corners.
- fixHotels: Hotels no longer display incorrect customer counts; counts now reset at midnight.
- changeBenchmark: Benchmark screen now displays screen resolution instead of the game version.
- changeBenchmark: Implemented small UI improvements to the benchmark page.
- fixEncyclopedia: Fixed various typos and incorrect information within the encyclopedia.
- fixGlossary: Fixed controller scrolling issues in the Glossary when using high text scale values.
- fixGlossary: Fixed the Glossary search bar turning bright green when selected with a controller.
🚉City Stations Creator Pack(5)
- buffCompact Bus Depot: Adjusted unlock criteria for the Compact Bus Depot so it no longer requires an existing bus depot on the map.
- fixSmall Bus Terminal: Fixed bus lane directions on the Small Bus Terminal so doors now face the bus stop.
- fixCity Central Train Station: Corrected a lighting asset at the City Central Train Station that was positioned several meters underground.
- fixCompact Refurbished Tram Depot: Improved tram track connections for the Compact Refurbished Tram Depot when placed at sharp turning angles.
- fixSmall Tram Plaza: Small Tram Plaza no longer incorrectly displays a 'Road Required' notification on Medium Roads or Pedestrian Streets.
⚙️Performance & Stability(7)
- fixVolumetrics: Fixed Volumetrics Quality Settings not applying correctly in the settings menu.
- fixRegion Packs: Fixed a Region Pack serialization issue related to fire hazard settings.
- fixStability: Fixed a startup error that occurred when launching the game without Discord running.
- fixLocalization: Updated localization across several languages, with specific focus on Simplified Chinese feedback.
- fixPlaysets: Fixed an error causing long deactivation times when disabling a playset.
- fixLogs: Removed unnecessary CSS warning messages from the game log.
- fixEditor: Custom water and terrain assets no longer cause autosaving to fail in the Editor.
🛠️Modding(2)
- newModding.log: Modding.log now explicitly lists the active playset and all enabled mods.
- buffMod loading: Improved mod loading at launch; if mods take longer than two seconds, the game proceeds to the menu and finishes loading in the background.
Summary
Patch 1.5.9f1, titled 'Morning Dew', focuses on refining core simulation systems and visual fidelity. Key improvements include smarter vehicle lane selection to reduce traffic congestion, a significant overhaul of shadow rendering to eliminate flickering and distance artifacts, and new UI sliders for customizing zone cell visibility. The update also addresses several bugs within the City Stations Creator Pack and improves mod loading stability.