Unity 6000.4.0b6
BETAReleased Tuesday, January 27, 2026
AI Summary
PremiumUnity 6000.4.0b6 introduces improvements to build system performance and fixes several critical issues across graphics, scripting, and the editor. Notably, Linux ARM64 dedicated server builds are now more accessible, and DirectStorage performance on Windows has been enhanced.
Key Highlights
- ▸Improved performance for opening files on Windows with DirectStorage enabled.
- ▸Linux ARM64 dedicated server builds no longer rely on internal tools, enabling source code customers to build for this platform.
- ▸Fixed an issue where Adaptive Performance generated logs in non-development builds.
- ▸Resolved a bug causing valid package signatures to be flagged as invalid if validated after the signing certificate expired.
- ▸Fixed an issue where the Material Inspector showed duplicate entries in the Shader dropdown.
⚠️ Known Issues
- UUM-132332 6000.0.54f1: 100% crash rate when loading two profiler captures in the Profile Analyzer compare tool
- UUM-132182 6000.0.55f1,6000.3.0a4: Crash on RaiseException when creating a multiplayer room while toggling UI
- UUM-131104 6000.0.64f1: [DX12] [Win11 ARM64] Machine crashes and restarts while trying to create a new project
- UUM-132342 6000.1.0a2,6000.0.64f1: Single-pass stereo rendering shows only Skybox when entering Play mode
- UUM-131198 6000.3.0a1: Last selected asset before docking Animation window gets selected when a domain reload occurs
- UUM-132303 6000.3.0a1: [WinEditor] Editor "freezes" after focus loss when Search native DialogBox is up
- UUM-131962 6000.3.0b1,6000.0.65f1: Editor freezes when QualitySettings.maxQueuedFrames is set to 1 and DX12 is used
- UUM-131707 6000.5.0a1,6000.3.2f1: Crash with multiple stack traces when using DX12 and selecting all spline knots
- Editor: Fix incorrect menu order for uGUI gameobject creation resulting in auto-rename failing.
- (UUM-132217) *Fixed in 6000.4.0b7.*
- UUM-125284 IL2CPP: [iOS] [Android] External library generics fail during IL2CPP build
- UUM-130881 iOS: Rendering freezes and UnityGfxDeviceWorker crash when Show Splash Screen is enabled and Project is built using Unity as a Library
- UUM-125778 Metal: Game freezes after command buffer Timeout error
- UUM-121453 Metal: [iOS] Screen flashing after the iOS splash screen
- UUM-130076 Scripting Buildtime: "Script updater for [...] failed with exitcode [...] and stdout: Stack overflow." errors thrown in console when a project using obsolete API is opened
- SRP Core: Fix Render Graph failing to handle Gizmos rendering with a DepthCopy pass when MSAA is enabled and the Decal Renderer Feature set to Automatic or DBuffer in URP.
- (UUM-131330) *Fixed in 6000.4.0b7.*
- UUM-132677 : Editor memory leak when entering and exiting Play Mode in a blank URP project
- UUM-132415 : Silent crash when importing SVG files
- ### New 6000.4.0b6 Entries since 6000.4.0b5
📈 Improvements
- Build Pipeline: Made Linux ARM64 dedicated server builds not rely on internal tools, allowing source code customers to build for Linux ARM64.
- Windows: Improved performance of opening files on Windows with DirectStorage enabled
⚡ API Changes
- EmbeddedLinux: Changed: Rename properties in Windowing API to use camel case.
- (UUM-132372)
- *First seen in 6000.4.0b6.*
- QNX: Changed: Rename properties in Windowing API to use camel case.
- (UUM-132372)
- *First seen in 6000.4.0b6.*
🔧 Bug Fixes
- UUM-131941 Adaptive Performance: Fixed an issue where Adaptive Performance generated logs in non-development builds.
- UUM-128853 Android: Improve gradle dependency setup for merge_variant_JniLibFolders versus buildIl2Cpp.
- STO-3747 Editor: Change toolbar elements max-width to fix elements that are too small.
- UUM-116130 Editor: Fixed a performance regression caused by the Meta pass not being stripped out in builds.
- UUM-132087 Editor: Fixed an issue where custom property drawers would be DIsposed when they were still in use.
- UUM-130625 Editor: Fixed Linux OS notifications from appearing when switching away from Unity through the Dock.
- UUM-131672 Editor: Fixed the contextual menu of the main toolbar slider showing multiple separators.
- UUM-104411 GI: Fixed an issue where closed Subscenes did not open before APV baking started when "Generate Lighting" was pressed in the Lighting window.
- UUM-13300 Package Manager: Package Manager: Resolved a bug causing valid package signatures to be flagged as invalid if validated after the signing certificate expired.
- Profiler: Profiler: Fixed native memory rooting for memory used for the profiler or using the MemLabel kMemProfiling/kMemProfilingEditor that would show up in the Memory Profiler as Native > Unity Subsystems > Unrooted.
- (UUM-128226)
- *First seen in 6000.5.0a2.*
- UUM-132128 Shaders: Fixed an issue where the Material Inspector showed duplicate entries in the Shader dropdown.
- UUM-131303 UI Toolkit: Fixed an invalid StyleSheet warning that displayed for non-standard properties when using a RGBA color with an alpha value that did not contain a leading zero, such as .85 instead of 0.85.
- UUM-131361 UI Toolkit: Fixed an issue that prevented sprites from loading when referenced from a USS file.
- #### New 6000.4.0b6 Package Changes since 6000.4.0b5
📦 Packages Updated
All Changes by Category
🎬Animation(2)
UUM-131198 6000.3.0a1: Last selected asset before docking Animation window gets selected when a domain reload occurs
📦Asset Pipeline(1)
UUM-13300 Package Manager: Package Manager: Resolved a bug causing valid package signatures to be flagged as invalid if validated after the signing certificate expired.
🏗️Build System(3)
Windows: Improved performance of opening files on Windows with DirectStorage enabled
- Build Pipeline: Made Linux ARM64 dedicated server builds not rely on internal tools, allowing source code customers to build for Linux ARM64.
🔧Editor(7)
UUM-130625 Editor: Fixed Linux OS notifications from appearing when switching away from Unity through the Dock.
UUM-132303 6000.3.0a1: [WinEditor] Editor "freezes" after focus loss when Search native DialogBox is up
UUM-131962 6000.3.0b1,6000.0.65f1: Editor freezes when QualitySettings.maxQueuedFrames is set to 1 and DX12 is used
STO-3747 Editor: Change toolbar elements max-width to fix elements that are too small.
UUM-116130 Editor: Fixed a performance regression caused by the Meta pass not being stripped out in builds.
UUM-132087 Editor: Fixed an issue where custom property drawers would be DIsposed when they were still in use.
UUM-131672 Editor: Fixed the contextual menu of the main toolbar slider showing multiple separators.
📝General(6)
UUM-131707 6000.5.0a1,6000.3.2f1: Crash with multiple stack traces when using DX12 and selecting all spline knots
UUM-132415 : Silent crash when importing SVG files ### New 6000.4.0b6 Entries since 6000.4.0b5
UUM-131104 6000.0.64f1: [DX12] [Win11 ARM64] Machine crashes and restarts while trying to create a new project
UUM-104411 GI: Fixed an issue where closed Subscenes did not open before APV baking started when "Generate Lighting" was pressed in the Lighting window.
UUM-125778 Metal: Game freezes after command buffer Timeout error
🎨Graphics(5)
UUM-132128 Shaders: Fixed an issue where the Material Inspector showed duplicate entries in the Shader dropdown.
UUM-130881 iOS: Rendering freezes and UnityGfxDeviceWorker crash when Show Splash Screen is enabled and Project is built using Unity as a Library
SRP Core: Fix Render Graph failing to handle Gizmos rendering with a DepthCopy pass when MSAA is enabled and the Decal Renderer Feature set to Automatic or DBuffer in URP. (UUM-131330) <br>*Fixed in 6000.4.0b7.*
UUM-132677 : Editor memory leak when entering and exiting Play Mode in a blank URP project
UUM-132342 6000.1.0a2,6000.0.64f1: Single-pass stereo rendering shows only Skybox when entering Play mode
📱Mobile(2)
UUM-128853 Android: Improve gradle dependency setup for merge_variant_JniLibFolders versus buildIl2Cpp.
UUM-121453 Metal: [iOS] Screen flashing after the iOS splash screen
🌐Networking(1)
UUM-132182 6000.0.55f1,6000.3.0a4: Crash on RaiseException when creating a multiplayer room while toggling UI
⚡Performance(4)
- UUM-132332 6000.0.54f1: 100% crash rate when loading two profiler captures in the Profile Analyzer compare tool
- UUM-131941 Adaptive Performance: Fixed an issue where Adaptive Performance generated logs in non-development builds.
Profiler: Profiler: Fixed native memory rooting for memory used for the profiler or using the MemLabel kMemProfiling/kMemProfilingEditor that would show up in the Memory Profiler as Native > Unity Subsystems > Unrooted. (UUM-128226)<br> *First seen in 6000.5.0a2.*
📜Scripting(4)
UUM-130076 Scripting Buildtime: "Script updater for [...] failed with exitcode [...] and stdout: Stack overflow." errors thrown in console when a project using obsolete API is opened
- EmbeddedLinux: Changed: Rename properties in Windowing API to use camel case. (UUM-132372)<br> *First seen in 6000.4.0b6.*
UUM-125284 IL2CPP: [iOS] [Android] External library generics fail during IL2CPP build
QNX: Changed: Rename properties in Windowing API to use camel case. (UUM-132372)<br> *First seen in 6000.4.0b6.*
🖼️UI(3)
UUM-131303 UI Toolkit: Fixed an invalid StyleSheet warning that displayed for non-standard properties when using a RGBA color with an alpha value that did not contain a leading zero, such as .85 instead of 0.85.
UUM-131361 UI Toolkit: Fixed an issue that prevented sprites from loading when referenced from a USS file. #### New 6000.4.0b6 Package Changes since 6000.4.0b5
Editor: Fix incorrect menu order for uGUI gameobject creation resulting in auto-rename failing. (UUM-132217) <br>*Fixed in 6000.4.0b7.*
View original release notes: Unity 6000.4.0b6 Release Notes