Release notes

Known Issues in 2021.2.4f1

  • 2D: Reordering "Sorting Layers" list causes Sprites to reference different Layer names and ID (1376779)

  • AI: NavMesh Agent can not pass through passable area between carving NavMesh Obstacles (1346325)

  • Android: Sometimes text is not rendered when using OpengLES3 on a Xiaomi Redmi9A device. (1347186)

  • Android: * Devices might wake up from sleep when in split screen mode.

    • Chrome OS devices that support tablet mode might not pause apps when they are no longer visible.
    • Some Android devices may experience delayed resolution updates after resizing a window.
    • Minimum window size might not be respected properly on all Android devices.
  • DirectX12: Objects are not lighted in Game view when using SEGI system with Graphics API for Windows set to Direct3D12 (1375746)

  • HD RP: HDRP Template fills the Console with "Shader error...couldn't open include file" messages after building the project (1342989)

  • IMGUI: List Elements in the PropertyField disappear when the window is displayed on the second screen (1371078)

  • Inspector Framework: MonoBehaviour script with an attached Icon disappears when Selecting the Game Object (1379500)

  • Linux: Player settings and other options are locked after script compilation (1380015)

  • Linux: Linux Editor crashes at "RegisterRuntimeInitializeAndCleanup::ExecuteCleanup()" when quitting from "Enter Safe Mode" prompt (1374087)

  • Linux: Linux Editor crashes at "__assert_fail_base.cold" when opening a project (1375312)

  • Linux: [HDRP] Editor crashes when opening HDRP Sample Project (1381237)

  • MacOS: Editor freezes when Vsync is enabled and Game View window is resized on macOS (1375973)

  • MacOS: [OSX][Editor] DirectoryNotFoundException errors appear when a project is created inside a directory with unicode characters (1377915)

  • Progressive Lightmapper: Crash while sculpting Terrain and Baking Lightmaps (1266511)

  • Progressive Lightmapper: [GPU PLM] Crash after enabling Auto at the end of Bake - OpenCLRenderLightmapBuffers.HasBakingBuffers() (1379762)

  • Progressive Lightmapper: [GPU PLM] Fallback to CPU PLM in CL_INVALID_MEM_OBJECT after switching light color only and rebaking GI (1356714)

  • Scene Management: Instantiated FBX through code throws error after leaving Play Mode (1363573)

  • Scripting: Error CS8035 is thrown on opening a project when using rulesets (1349517)

  • Scripting: Only some assemblies fail to be loaded when assembly name does not match the file name (1345099)

  • Serialization: [SERIALISATION] Going into play mode does not deserialize the object properly (1383439)

  • ShaderGraph: [General][AssetDB][URP] Adding URP to the project causes reimports of many assets and goes into infinite import loops (1374611)

  • Shadows/Lights: Memory access violation in LightProbesManager when appending LightProbes objects with overlaps twice (1377416)

  • Shadows/Lights: Scene is brighter in Standalone player if it was open in the Editor at build time (1375015)

  • Shuriken: [Particles] Inspector breaks and errors are thrown when the Material field is deleted from the Particle System (1379541)

  • Vulkan: [Editor] The Scene's GameObjects textures are seemingly random and change colours depending on the Scene's Camera pos. (1337772)

  • Window Management: Broken layout stops panels located in the top left corner of the Editor from rendering in the Karting Microgame project (1367783)

  • XR SDK: Severe flickering in Unity 2020.3.21f1 with OpenXR on HL2 (1376203)

  • XR SDK: [XR][Linux] Scene View doesn't render when opening new AR or VR Template project or pressing "Show Tutorials" (1362435)

2021.2.4f1 Release Notes


  • Editor: Improved performance of Picking objects in the Scene View.

API Changes

  • Core: Changed: Moved ProfilerStartFrame to Initialization section of scriptable player loop (1363905)

  • Graphics: Added: Added a field to the CullingParameters structure to allow for adjustment to the near clipping plane for shadow clipping - this is independent of the rendering camera near clipping plane.

  • Graphics: Removed: Removed uploadClearedTextureDataAfterCreationFromScript from PlayerSettings as it was not working as intended and will be superseded with a per-texture flag.

  • Windows: Added: UnityEngine.Windows.Input.ForwardRawInput now has a second overload that is usable without enabling unsafe code.

  • XR: Added: Support for late latched previous view matrix for URP motion vectors


  • XR: The Oculus XR Plugin package has been updated to 1.11.0.

  • XR: Updated XR Management to 4.2.0

  • XR: Updating Build Messaging with deprecation text for Lumin


  • 2D: Fixed an issue where removing an edge in the Skinning editor would result in the mesh falling back to a quad. (1365831)

  • 2D: Fixed case where Bounds can cause spriteshape not load in when running Player. (1368107)

  • 2D: Fixed crash when optimizing the geometry of the SpriteShape in certain cases. (1364012)

  • 2D: Fixed errors in the Sprite Skin section of documentation. (1366617)

  • 2D: Quads are now generated at correct positions after removing all vertices from Sprite meshes. (1366633)

  • Android: Fixed performance regression when using MSAA backbuffer with Vulkan. (1351579)

  • Animation: Fixed grid in Animator window to always correctly cover the entire graph area. (1337632)

  • Asset Pipeline: Fixed a performance regression where projects with large numbers of precompiled assemblies might experience slower import times. (1372980)

  • Asset Pipeline: Fixed an issue where a project containing a symbolic link could crash on startup on Windows. (1370389)

  • Build System: Fixed error "Cannot find mono image in MonoManager for assembly x" during assembly reload when calling ContentBuildInterface:GetPlayerObjectIdentifiersInAsset.

  • Editor: Fixed editor crashes when exiting and keeping a tutorial project. (1338299)

  • Editor: Fixed frame debugger does not update issue after clicking frame navigation arrows. (1329150)

  • Editor: Fixed reflection probe baking sometimes containing the cyan loading shader. (1368213)

  • Editor: Fixed Unity Package Manager diagnostic tool failing to run when started via the launch script.

  • GI: Fixed bug where lighting information on renderers would occasionally be scrambled or lost when saving a scene. (1359018)

  • GI: Fixed crash when baking 4K lightmap with maximum AA setting. (1318800)

  • Graphics: [Vulkan] Profiler shows that the Texture memory usage is lower when Vulkan is used on some devices. (1354202)

  • Graphics: [Vulkan] Texture Memory in Memory Profiler Module is not updated when profiling a Vulkan build. (1351803)

  • Input System: Fixed incorrect Windows input event timestamps.

  • iOS: Enabled ProMotion on ios15 and new devices (iphone13 family). (1374612)

  • iOS: Fixed value of Screen.safeArea retrieved during initialization of packages. (1288515)

  • N/A (internal): Fixed Unity splash screen for some devices on EmbeddedLinux.

  • Networking: UnityWebRequest now supports gzip compression on Windows. (1343274)

  • Package: Fixed property drawing of Unity.Mathematics vector types when manually drawing a property that was hidden with [HideInInspector]. (1298368)

  • Package Manager: Fixed the issue where delayCall delegate's Invocation List size doubles when the Package Manager is docked and the delayCall is Invoked. (1336406)

  • Package Manager: Fixed the issue where OAuth errors are not logged in the console. (1376308)

  • Package Manager: Removed extra fetch calls after Package Manager resolve. Should fix some Package Manager unit test instabilities. (1379219)

  • Particles: Fixed right-click context menu for Renderer module Inspector. (1372195)

  • Prefabs: Fixed crash with broken scenes where Transform has a PrefabInstance, but the containing GameObject doesn't have one
    Fixed instability caused by non deterministic order of stripped components. (1325967)

  • Profiler: Fixed "Missing Profiler.EndSample: WaitForTargetFPS" errors in development builds. (1363905)

  • Profiler: Fixed incorrect frame boundary location when profiling standalone builds. (1332845)

  • Project Browser: Project Browser slider is correctly restored when clearing the search field after selecting a favorite filter. (1348825)

  • Scene/Game View: Fixed new Scene View tabs not copying overlays layout of previous Scene View. (1336748)

  • Serialization: In addition to SerializeReference, class referred by value will also be considered and added to the list of classes not to be stripped when performing a Player Build / Asset Bundle Build / Addressable Build. (1296195)

  • UI Toolkit: Fixed issue where stylesheets added to a UIBuilder document were not cleared after created a new document. (1363722)

  • WebGL: Added workarounds for various Safari Web Audio bugs playing back compressed and looping audio clips. Fixed a regression in Unity audio backend that could cause an incorrect audio volume to be set for < 1 second duration at audio playback start time. (1350204)

Changeset: 99ba6aa4c552

Unity 2021.2.4

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