Unity 2020.3.4

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Known Issues in 2020.3.4f1

  • Animation: AnimationEvent is fired late or isn't fired at all when Animation's 'Motion Time' value is set manually (1324763)

  • Windows: [Windows 7] "WindowsVideoMedia error 0xc00d36b4" error is thrown when loading a video with the VideoPlayer (1306350)

  • Metal: Performance in Game View is significantly impacted by Gfx.WaitForPresentOnGfxThread when a second monitor is connected (1327408)

  • Terrain: All the textures are cleared when creating Texture array (1323870)

  • Animation: [Performance Regression] AnimationWindowState:get_allCurves takes approximately 5000ms to load animation in the Animation window (1320250)

  • HDRP: The camera doesn't rotate in HDRP Template with the SimpleCameraController.cs script (1326816)

  • Scene Management: Crash on BuildPrefabInstanceCorrespondingObjectMap when overriding nested prefab inside AssetDatabase.StartAssetEditing() block (1324978)

  • WebGL: "SharedArrayBuffer will require cross-origin isolation as of M91" warning is thrown when launching Player on Chrome (1323832)

  • 2D: [Skinning Editor] Vertex can't be created after modifying Vertexes weight and when Sprite is from the .psb file (1322204)

  • Linux: Linux Editor crashes at "_XFreeX11XCBStructure" when loading tutorials (1323204)

  • Terrain: Crash on TreeRenderer::WillRenderTrees when being in Play Mode for several seconds (1317966)

  • IMGUI: Contents of a ModalUtility window are invisible when it is launched from a Unity Context Menu (1313636)

  • Global Illumination: Reflection probes doesn't contain indirect scene lighting after the on-demand GI bake from the Lighting window (1324246)

  • Packman: User can't easily configure location of both UPM and Asset Store package local cache (1317232)

  • Templates: Editor Crashes when performing Undo and Redo after duplicating Game Object with LEGO Model Asset component (1298503)

  • Linux: InputSystem's Mouse delta values do not change when the Cursor lockState is set to Locked (1248389)

  • Scripting: Increased Script Assembly reload time (1323490)

  • Asset Importers: [Performance Regression] Importing an fbx model is noticeably slower when the model contains Animations (1265275)

  • Asset Bundles: Synchronous Asset Loading Does Not Correctly Load Preload Dependencies (1321141)

  • Packman: PackageManager.Client.SearchAll(offlineMode: true) returns an error if user offline (1319585)

  • Addressable Assets: Performance bug in PreloadManager::WaitForAllOperationToComplete (1322086)

  • Shader System: Editor crashes on UpgradeOldShaderSyntax when shaders are being upgraded during importing process (1299790)

  • Scripting: Crashes on mono_class_init when entering Play Mode after recompiling scripts (1262671)

  • XR: OpenXR + URP + UWP rendering stuck (1323833)

  • Mono: Built player takes multiple seconds to shut down (1295072)

  • Global Illumination: Wintermute::Geometry::Verify errors are spammed when baking a Mesh with Mesh Compression set to Medium/High (1319133)

  • Cloth: Cloth is broken when parent GameObject scale is lower than 1 and Surface Penetration constraints are set 0 (1319488)

  • MacOS: [macOS] "build is damaged and cannot be opened" error when downloading Unity build from internet (1323501)

  • Asset Importers: Wintermute::Geometry::Verify errors are spammed when baking a Mesh with Mesh Compression set to Medium/High (1313968)

  • Polybrush: [PolyBrush] Something went wrong saving brush settings Warning is thrown when Saving a Brush after opening the PolyBrush Window (1315475)

  • Templates: [Linux] Missing libdl.so library causes crash when entering Playmode for the second time or closing the Editor (1237642)

2020.3.4f1 Release Notes

System Requirements Changes


  • Graphics: Removed redundant calls when setting shader program parameters. (1317383)

  • XR: Removed "Preview" text from UI display element.

API Changes

  • Graphics: Added: New SystemInfo.supportsStoreAndResolveAction API to check for StoreAndResolveAction store action support on a specific platform.

  • Scripting: Changed: Roslyn Analyzers will be run as part of the normal compilation Step. This will also result in Analyzer errors to be treated as a compile error.


  • Package: Updated Cinemachine package to 2.6.4.

  • Package: Updated Oculus XR Plugin package to 1.9.0.

  • Package: Updated Timeline package to version 1.4.7.


  • Android: Fixed an issue with the black Unity view that occurred after pausing the app when in-app purchase dialog is shown. (1249179)

  • Animation: Fixed an issue where Timeline would stay stuck after going to Play Mode. (1315060)

  • Asset Import: Fixed an issue that was causing External Objects to no longer be displayed when selecting a Text Asset. (1301327)

  • Asset Pipeline: Fixed an issue to make Assertion failed on expression: 'ins.second || ins.first->second...' more descriptive. (1274912)

  • Editor: Fixed an issue that could cause a crash when detecting circular asset references. (1249114)

  • Editor: Fixed an issue to correct keymapping on linux for quote/backquote/doublequote keycodes. (1281473)

  • Editor: Fixed an issue when Window with 'hasUnsavedChanges' set to true not being saved when closed with Middle Mouse Button. (1307671)

  • Editor: Fixed LayoutGroup errors when renaming prefab after changes in isolation mode. (1291996)

  • Editor: Fixed ReorderableList array property disregarding 'includeChildren'. (1312364)

  • Graphics: Fixed a deadlock when scanning for mip streaming textures associated with a renderer. (1318903)

  • Graphics: Fixed an issue that caused StencilSampling to be incorrectly reported as supported due to incorrect mappings of FormatUsage between C# and C++. (1315531)

  • Graphics: Fixed an issue that caused VFX Assets to get tagged as dirty without touching them. (1307562)

  • Graphics: Fixed an issue that caused VFX Assets to revert after save. (1315191)

  • IL2CPP: Corrected the behavior of by-reference parameter for delegate async invocation when the by-reference parameter is after a non-by-reference parameter. (1313160)

  • IL2CPP: Fixed a crash in il2cpp::vm::LivenessState::AddProcessObject. (1315058)

  • IL2CPP: Fixed a possible ArgumentException when converting a call to a type that implements multiple variations of the same generic interface. (1319313)

  • IL2CPP: Fixed an exception when converting a method with a parameter that is an in generic parameter with a default value. (1313460)

  • IL2CPP: Fixed an issue that could potentially trigger an IndexOutOfRangeException with script debugging enabled. (1321876)

  • iOS: Fixed a crash on CreateBGRA32TextureFromCVTextureCache when launching an app. (1298967)

  • iOS: Fixed an issue with FixedUpdate being called on startup more times than it should be, to account for Time.deltaTime on first Update. (1318647)

  • iOS: Fixed an issue with UnityWebRequest that caused freezing on background/resume when the device is offline. (1315244)

  • Prefabs: Added support for multiselection 'Create Variant' in Project Browser. (1313946)

  • Prefabs: Fixed an issue so that the scene is no longer dirty after dragging a Prefab into the Scene view and then undoing. (1299185)

  • Prefabs: Fixed an issue when removing components from Prefab instances and when RequireComponent is added after creating the Prefab. (1284595)

  • Scripting: Fixed a compilation performance regression when editing scripts. (1317926)

  • Scripting: Fixed native-to-managed callback fails with Apple Silicon. (1305211)

  • Serialization: Fixed an issue that caused YAML parse errors if script class had field names ending with "guid". (1273539)

  • Shaders: Fixed a shader compilation regression on Win 7. (1318359)

  • UI Toolkit: Fixed an issue that caused an ellipsis to occasionally display on UI Toolkit labels. (1291452)

  • WebGL: Added handling for Norwegian Bokmal and Nynorsk in SystemInfo for macOS and Linux, and to SystemInfo in Runtime/Misc used by WebGL and MetroPlayer. (1288528)

System Requirements

For development

OS: Windows 7 SP1+, 10, 64-bit versions only; macOS 10.13+. (Server versions of Windows & OS X are not tested.)

CPU: SSE2 instruction set support.

GPU: Graphics card with DX10 (shader model 4.0) capabilities.

The rest mostly depends on the complexity of your projects.

Additional platform development requirements:
  • iOS: Mac computer running minimum macOS 10.13+ and Xcode 9.0 or higher.

  • Android: Android SDK and Java Development Kit (JDK); IL2CPP scripting backend requires Android NDK.

  • Universal Windows Platform: Windows 10 (64-bit), Visual Studio 2015 with C++ Tools component or later and Windows 10 SDK

For running Unity games

Generally content developed with Unity can run pretty much everywhere. How well it runs is dependent on the complexity of your project. More detailed requirements:

  • Desktop:

    • OS: Windows 7 SP1+, macOS 10.13+, Ubuntu 18.04+
    • Graphics card with DX10 (shader model 4.0) capabilities.
    • CPU: SSE2 instruction set support.
  • iOS player requires iOS 11.0 or higher.

  • Android: OS 4.4 or later; ARMv7 CPU with NEON support; OpenGL ES 2.0 or later.

  • WebGL: Any recent desktop version of Firefox, Chrome, Edge or Safari.

  • Universal Windows Platform: Windows 10 and a graphics card with DX10 (shader model 4.0) capabilities

  • Exported Android Gradle projects require Android Studio 3.4 and later to build


Third Party Notices

For more information please see our Open Source Software Licenses FAQ on the Unity Support Portal

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