SDK Bug & Feature Requests

When uploading avatars via multi-platform upload, if the avatars are children of a game object in the hierarchy, the build fails when it reaches another platform, and requires a restart of Unity to continue to upload. It also throws the error included below. Repro: Place Avatars for multiple platforms as children of an Empty Game Object Check all three build platforms Press Publish

SDK3.9.0 The same symptoms occur when using SDK 3.10.1 in a new project. This error occurs after Avatar Uploading and Signature Uploading.

When using Unity 2022.3.22f1 with VRChat SDK 3.10.1 (older versions might be affected too), then "VRC Avatar Descriptor" component is detecting the wrong unity version. "Pipeline Manager" is detecting the correct unity version. The Avatar Descriptor got imported. in debug view of the component i can just change the version number for "VRC Avatar Descriptor". It get's updated in Pipeline Manager automatic. Same happens when upgrading a project from a previous Unity version. This seems not to cause any technical issues.

The Harmony package, used by Udon Sharp, and a handful of third-party community plugins for runtime patching in the editor, has been updated to officially support ARM64 on all platforms (Windows, Linux, and yes, Mac). This will correct any in-editor issues when running the Unity Editor on these platforms. Whilst VRChat itself may only support PC & Android, the Unity Editor is a cross-platform utility, and there are a variety of folks with ARM-equipped machines who use such hardware for primary development, and therefor experience issues with the editor without patching. With the advent of full iOS support on the horizon, this may further increase the # of Mac-based content creators. Please update the provided package. Release notes for version where ARM64 support was added Addendum An experimental VPM package can be found at MisutaaAsriel/VRCHarmony which installs a packaged release of Harmony 2.4.1. Unity appears to, in all testing, prefer the package's copy of Harmony over the version included by the VRC Base SDK. This package may also be installed using the following VPM repository: Dreemurrs-Repository VRChat may use the DLL provided from this repository if need be, or take over the package if they so wish. — It is currently built off of the Release target of Harmony, at the solution level, with .NET Framework 4.5.2 using GitHub Actions Note Building Lib.Harmony against the DebugFat target at the project level, or building it for Release against net452 at the solution level creates a successful drop in replacement. The release builds when built at the .NET project level or downloaded from the main Harmony repository currently output a mangled DLL that Unity Burst is incompatible with. A bug report is open on this here: pardeike/Harmony/issues/728 For further reference, the original copy of Harmony is built against .NET 4.5.0, which is no longer a valid target. 4.5.2 was chosen as its nearest replacement. Edited @ EPOCH 1757603286

The UdonSharp/UtilityScripts folder and it's contents are recreated upon Recompile or Asset Reload for some world projects. Data loss can occur if a creator modified or added content to the existing scripts. This also changes their GUIDs which creates unnecessary changes on worlds shared via git. Related: https://feedback.vrchat.com/sdk-bug-reports/p/vrcdefaultworldscene-sometimes-is-recreated-upon-project-launch

I've had this issue with every SDK version 3.7.3 and beyond. Anything involving the new constraints doesn't work for me at all. In a new project, I would constrain a cube to the left hand of my avatar. Upon pressing play mode, I get 10 of this error in the image. When exiting play mode, my console gets infinitely spammed with this error. When re-entering play mode, the cube is no longer following the left hand of my avatar.

OS: Arch Linux (but any Linux would get the same results) Unity 2022.3.22f1 Unity project managed by ALCOM (a cross platform open-source alternative to VCC) VRChat SDK version is 3.8.2 Summary Setting Build Type to Build & Test Your Avatar in the VRC SDK window, then clicking Build & Test does not place the new avatar inside %LocalAppdata%Low\VRChat\VRChat\Avatars (as per documentation ), and it is thus impossible to locally test avatars. Why This happens because that directory does NOT exist on Linux; the virtual C: drive created for VRChat by Steam is inside its specific proton prefix, and as such the right path is more likely to be located near /path/to/SteamLibrary/steamapps/compatdata/438100/pfx/drive_c/users/steamuser/AppData/LocalLow/VRChat/VRChat/Avatars/ . This path is not right for every VRChat installation, because Steam allows for multiple game drives. Solutions I see two potential solutions; one of them requires fewer changes and is less practical for users : After building an avatar for testing, if the environment is Linux, provide users the path to the compiled avatar asset so that they can move it over to the right folder manually If the environment is Linux, inside the VRC SDK window, in the settings tab, add possibility to set the path to either the root of the virtual C: drive, or just to the folder where the user wants to export their testing avatars Please, please do ask more info if you need it, I will happily provide them, and I'd be happy to see this bug fixed I have found the location, it is inside .local/share/VRChat/VRChat/Avatars/, I have not seen that documented anywhere, maybe updating the docs would be nice... ~~Also if you just give me the path to the compiled avatar I'd be happy, I really wanted to test it out so...~~ Also, I would gladly fix it myself if the sdk was open source... is that planned ? Is it forbidden, in the meantime, to go and decompile and fix stuff for myself ? What about publishing fixed dlls ?

my SDK wont show me any of my avatar info unless i switch to the authentication tab and back. but it does not fix the issue where my 'review any alerts' tab will not show me anything and it has been like that for a few days now . when i switch to a new project it also doesnt work. i have reimported the sdk, reloaded it, reopened my project and restarted my computer and nothing has worked . it still lets me upload avatars but i am worried abt when i go to upload new ones that i require help with the sdk to auto fix errors for me.

Summary: The VRChat SDK is causing Unity to falsely detect prefab overrides when no actual changes have been made. This issue occurs both during general SDK activity (not just when opening the SDK tab) and specifically when uploading or updating avatars. It often flags the Avatar Descriptor component as "changed," even when untouched. Steps to Reproduce: Open a Unity project with VRChat SDK (SDK3 - Avatars). Create or load a prefab-based avatar. Upload or re-upload the avatar via the SDK. After upload completes, observe that the avatar prefab now shows "Unapplied Overrides" in the inspector. Open the prefab and inspect the VRC_AvatarDescriptor — Unity claims it's been modified, even though no changes were made. Expected Behavior: Uploading or interacting with the SDK should not trigger false prefab overrides when no values were changed. Avatar Descriptor and other components should remain untouched unless explicitly edited. Actual Behavior: Prefab instances are flagged with "Unapplied Overrides" after uploading or interacting with the SDK. The VRC_AvatarDescriptor component is frequently shown as modified, despite no visible differences. These overrides appear without user input, leading to confusion and unnecessary prefab management. Known Triggers: Uploading or re-uploading avatars. SDK interactions during project use (not limited to opening the SDK tab). SDK updates that introduce new systems like (often re-introduce the bug): PhysBones, Constraints, Per-platform Avatar Overrides Impact: Disrupts normal Unity workflow and prefab integrity. Forces creators to manually check or apply overrides to maintain consistency. (Sometimes not even working and getting stuck in an override change loop) Risk of unintentionally applying unwanted changes or overwriting important prefab data. Time-consuming and frustrating for creators managing large or complex prefabs. Additional Notes: This issue has persisted across multiple SDK updates and is easily reproducible. It appears tied to how the SDK modifies or refreshes component data internally. Given how fundamental prefabs are to Unity projects, this issue should be considered a high-priority bug — especially for avatar creators relying on clean and reliable prefab behavior.

Followed the this https://creators.vrchat.com/platforms/android/build-test-mobile/ but it fails to lunch vrchat on my phone after building it even puts the file on my phone so i know for sure adb is working and getting this in my editors console and tried this with 2 different world projects now AdbException: ADB failed with exit code 1. StdOut:Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.vrchat.mobile.playstore/com.vrchat.app.MainActivity (has extras) } StdError:Error type 3 Error: Activity class {com.vrchat.mobile.playstore/com.vrchat.app.MainActivity} does not exist. VRC.SDK3.Editor.Builder.ADB.Command (System.String[] arguments) (at <8c33ac67c14b4f31a7515261397206c6>:0) VRC.SDK3.Editor.Builder.ADB.StartVRChatIntoWorld (System.String remoteBundleFilePath, System.String appPackageName) (at <8c33ac67c14b4f31a7515261397206c6>:0) VRC.SDK3.Editor.Builder.VRCWorldAssetExporter.RunWorldTestAndroid (System.String bundleFilePath) (at <64d127784e7f4289a5a7ffbe49df807e>:0) VRC.SDK3.Editor.Builder.VRCWorldAssetExporter.RunScene (System.String bundleFilePath) (at <64d127784e7f4289a5a7ffbe49df807e>:0) Rethrow as WorldAssetExportException: An ADB command failed to execute. Check the console for more details. VRC.SDK3.Editor.VRCSdkControlPanelWorldBuilder.Build (System.Boolean runAfterBuild) (at ./Packages/com.vrchat.worlds/Editor/VRCSDK/SDK3/VRCSdkControlPanelWorldBuilder.cs:2576) VRC.SDK3.Editor.VRCSdkControlPanelWorldBuilder.BuildAndTest () (at ./Packages/com.vrchat.worlds/Editor/VRCSDK/SDK3/VRCSdkControlPanelWorldBuilder.cs:3282) VRC.SDK3.Editor.VRCSdkControlPanelWorldBuilder.OnBuildAndTestAction () (at ./Packages/com.vrchat.worlds/Editor/VRCSDK/SDK3/VRCSdkControlPanelWorldBuilder.cs:2147) System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.<ThrowAsync>b__7_0 (System.Object state) (at <27124aa0e30a41659b903b822b959bc7>:0) UnityEngine.UnitySynchronizationContext+WorkRequest.Invoke () (at <cb81df0c49c643b1a04d9fc6ccca2433>:0) UnityEngine.UnitySynchronizationContext.Exec () (at <cb81df0c49c643b1a04d9fc6ccca2433>:0) UnityEngine.UnitySynchronizationContext.ExecuteTasks () (at <cb81df0c49c643b1a04d9fc6ccca2433>:0)