SDK Bug & Feature Requests

This issue has been occurring for a while, and while there may already be existing reports, I am reporting this again since it has remained unresolved for so long. When there are multiple avatars in the same scene and you manage them by making them active only during modifying or uploading, the following steps can cause incorrectly recognized upload targets, resulting in the information for the wrong target being updated or an error occurring by internally attempting to build a non-active avatar. (“Selected Avatar” dropdown appears to be showing the correct avatar, but the avatar information and alerts displayed are for the previous avatar.) Make one avatar active. Open the Builder tab in the Control Panel and have the SDK recognize that avatar. Close the SDK Control Panel. With the Control Panel closed, make another avatar active and set the previous avatar to inactive. Open the Control Panel again. Incorrect information is displayed. If you try to upload the avatar or update the avatar’s information, it will lead to unintended results. New users are also likely to encounter this issue, and since the problem doesn't occur if the Control Panel is kept open, other users may not know about the issue. Therefore, it can be difficult to identify the cause of these unintended results. Tested Environment: Unity: 2022.3.22f1 SDK: 3.10.4, 3.10.5-beta.1

In the new SDK 3.7.6, it's now possible to build a world on Linux, but it is not possible to launch a local test with proton. Pls add proton support, similarly to: https://github.com/BefuddledLabs/LinuxVRChatSDKPatch

Currently, the VCC always creates Windows projects by default. When installing Unity, the VCC should install the modules required for Android and iOS. It would be nice if users could choose Android or iOS directly instead of switching to it after project creation.

https://ask.vrchat.com/t/developer-update-27-august-2026/48877#p-90617-variable-width-avatar-parameters-8 Regarding Variable Width Avatar Parameters, A Float with 6 bits from range -1 to 1 has the same precision as a Float with 5 bits from range 0 to 1. Allow us to change what range a Float handles.

This error only appears when attempting to build. There is no Alert nor does the error show how to fix the issue at all. An Alert and Auto Fix button would help a lot. For ClientSim issues, see sister post https://feedback.vrchat.com/sdk-bug-reports/p/3104-clientsim-does-not-have-dedicated-broken-network-ids-error

Similar to https://feedback.vrchat.com/sdk-bug-reports/p/vrcsdk-packagejson-is-missing-dependency-on-unity-ui but for different packages com.vrchat.base requires the following packages, but not included in package.json com.unity.modules.physics2d (DOTween requires that) com.unity.modules.video ( WorldValidation.cs requires that) com.unity.test-framework ( Packages/com.vrchat.base/Editor/VRCSDK/Dependencies/VRChat/Tests/ and com.vrchat.base/Editor/VRCSDK/VTP/VTPTests.cs requires that) In addition, com.unity.xr.oculus which is dependency of com.vrchat.base , requires the following package. This missing dependency should be fixed by unity side, but having dependency by VRChat SDK prevents future problems. com.unity.modules.androidjni For com.unity.test-framework , removing related code from VRCSDK instead of adding com.unity.test-framework to package.json can also be a solution I think. For other packages, please add these packages with corresponding version to package.json of com.vrchat.base . I tested with 3.10.5 and 3.10.5-beta.1 with completely blank project manually created originally for finding missing dependency on my tool.

Unity: 2022.3.22f1 VRChat SDK - Worlds: 3.10.4 Title: ClientSim corrupts PlayerObject strings containing nested JSON Environment: Unity 2022.3.22f1 Worlds SDK 3.10.4 Reproduction: Add an Udon-synced string to a PlayerObject. Store JSON containing another serialized JSON string: {"outerKey":"[\"innerValue\"]"} Call RequestSerialization() and allow ClientSim to save the PlayerObject. Exit and enter Play Mode again. ClientSim fails while restoring the saved PlayerObject. ClientSim saves: "{\"outerKey\":\"[\\"innerValue\\"]\"}" It should save: "{\"outerKey\":\"[\\\"innerValue\\\"]\"}" The backslash preceding each nested quote is not escaped for the additional ClientSim JSON storage layer. The malformed value is loaded as a DataToken.Error, but ClientSim then accesses it as a DataDictionary in ClientSimNetworkIdHolder.Decode() line 180 As a result, the PlayerObject is not restored and all persistence stored in it appears lost. ClientSim may subsequently overwrite the file with empty/default data. The same nested JSON persistence seems to works correctly in the real VRChat client, so this appears to be specific to ClientSim’s local PlayerObject save/load implementation. Trace stack: InvalidOperationException: Attempted to access Error token as DataDictionary VRC.SDK3.Data .DataToken.get_DataDictionary () (at <8dae6d6858f2465fad961e5d8ef394cc>:0) VRC.SDK3.ClientSim.ClientSimNetworkIdHolder.Decode ( VRC.SDK3.Data .DataList data) (at ./Packages/com.vrchat.worlds/Integrations/ClientSim/Runtime/Networking/ClientSimNetworkIdHolder.cs:180) VRC.SDK3.ClientSim.ClientSimNetworkingView.Decode ( VRC.SDK3.Data .DataList data) (at ./Packages/com.vrchat.worlds/Integrations/ClientSim/Runtime/Networking/ClientSimNetworkingView.cs:95) VRC.SDK3.ClientSim.Persistence.ClientSimPlayerObjectStorage.Decode () (at ./Packages/com.vrchat.worlds/Integrations/ClientSim/Runtime/Player/PlayerPersistence/ClientSimPlayerObjectStorage.cs:165) VRC.SDK3.ClientSim.Persistence.ClientSimPlayerObjectStorage.OnPlayerJoined (VRC.SDK3.ClientSim.ClientSimOnPlayerJoinedEvent payload) (at ./Packages/com.vrchat.worlds/Integrations/ClientSim/Runtime/Player/PlayerPersistence/ClientSimPlayerObjectStorage.cs:102) VRC.SDK3.ClientSim.ClientSimEventDispatcher.SendEvent[T] (T clientSimEvent) (at ./Packages/com.vrchat.worlds/Integrations/ClientSim/Runtime/Events/ClientSimEventDispatcher.cs:62) VRC.SDK3.ClientSim.ClientSimPlayerManager.DispatchPlayerJoinedEvent (VRC.SDKBase.VRCPlayerApi player) (at ./Packages/com.vrchat.worlds/Integrations/ClientSim/Runtime/System/ClientSimPlayerManager.cs:137) VRC.SDK3.ClientSim.ClientSimPlayerManager.OnClientSimReady () (at ./Packages/com.vrchat.worlds/Integrations/ClientSim/Runtime/System/ClientSimPlayerManager.cs:129) VRC.SDK3.ClientSim.ClientSimMain+<InitializeClientSim>d__45.MoveNext () (at ./Packages/com.vrchat.worlds/Integrations/ClientSim/Runtime/System/ClientSimMain.cs:399) UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) (at <cb81df0c49c643b1a04d9fc6ccca2433>:0)

VRC Light Volumes is a voxel based light probes replacement for VRChat. https://github.com/REDSIM/VRCLightVolumes Once it's introduced to avatar shaders, their appearance would be amazingly improve in appropriate worlds. Major shaders like lilToon and Poiyomi already support this system in the latest version. It would be great if Toon Standard also support this. Mobile users also can get benefits. Shader developers documentation: https://github.com/REDSIM/VRCLightVolumes/blob/main/Documentation/ForShaderDevelopers.md Japanese summary: Toon StandardでVRC Light Volumesをサポートしてほしいという要望。MobileプラットフォームでもVRC Light Volumesを利用できるようになる。

Once out of beta would vrchat still be open to expanding the suggested collision tags? And if so would it be from canny posts, or when they think a tag is popular enough. with contacts being added to worlds the standardization for tags I think is going to be getting a lot bigger. especially if people design systems that use a bunch of specific tags. To take some of the load off of vrchat, having a way people can either create their own tag list or download a list by someone else. and have it show up in editor would help making standard tags people make easier to use.

Please provide fallback shaders with VRCSDK and API to get them from material. There are multiple possible use cases like: To create avatar with exactly same look with and without Fallback - Currently, since we don't have fallback shaders, we cannot create avatar consistently looks same with and without fallback. To create Editor Extensions that shows the fallback-ed version of the avatar. - There are some editors exists but their implementation might can be different. - There is no documentation that explains the exact algorithm for parsing VRCFallback tag so we don't know which shader will be applied for wired VRCFallbackTag like ToonCutoutUnlit . To retrieve list of properties used in each fallback shader. - I want to get (current) list of properties supported in each fallback shader to remove unused properties from the material. - There are list of properties copied to fallback material on creator docs, but some fallback shader may not use some properties on the list (like Toon does not use most properties but _MainTex ).