UE + Skeleton does not work

alin · February 28, 2026, 1:49am

Hello @Stepan.Reuk and nuitrack team,

I am trying to figure out the tech pipeline for a very time sensitive project and wondering if anyone from nuitrack team may be able to help with this. I have purchased the AI subscription and was testing different functions of nuitrack in UE.

Gestures work every other time, and the “fitting room” seems to work as well.

However, the skeleton joints do not work at all - they do not show up in the scene, neither the tutorial version which I recreated not the sample level version from the plugin.

I am using UE 5.6 and downloaded the plugin from Fab, as well as made a purchase and followed all instructions to install Nuitrack. I am using realsense d415 sensor.

Thank you for your suggestions, I really appreciate it!

Stepan.Reuk · March 2, 2026, 8:47am

Hello @alin

Are there any errors or warnings in the log?
Can you send a screen recording from the “Skeleton Joints” level?

alin · March 2, 2026, 3:25pm

Hello @Stepan.Reuk thank you for your reply!

There are no warnings & errors in the log
Here is the recording. It is pretty uneventful - nothing is happening, the joints don’t show up.
Ignore the 0s printing on tick - I was trying to figure out what causes the issue.

I am really hoping that this can be resolved, please let me know if I can provide any other information.

Here is the log:

LogSlate: Updating window title bar state: overlay mode, drag disabled, window buttons hidden, title bar hidden
LogWorld: BeginTearingDown for /NuitrackPlugin/Samples/SkeletonJoints/Level/UEDPIE_0_SkeletonJoints
LogWorld: UWorld::CleanupWorld for SkeletonJoints, bSessionEnded=true, bCleanupResources=true
LogSlate: InvalidateAllWidgets triggered.  All widgets were invalidated
LogPlayLevel: Display: Shutting down PIE online subsystems
LogSlate: InvalidateAllWidgets triggered.  All widgets were invalidated
LogSlate: Updating window title bar state: overlay mode, drag disabled, window buttons hidden, title bar hidden
LogAudioMixer: Deinitializing Audio Bus Subsystem for audio device with ID 3
LogAudioMixer: Display: FMixerPlatformXAudio2::StopAudioStream() called. InstanceID=3, StreamState=4
LogAudioMixer: Display: FMixerPlatformXAudio2::StopAudioStream() called. InstanceID=3, StreamState=2
LogUObjectHash: Compacting FUObjectHashTables data took   0.60ms
LogPlayLevel: Display: Destroying online subsystem :Context_3
LogAssetEditorSubsystem: Opening Asset editor for MapBuildDataRegistry /NuitrackPlugin/Samples/SkeletonJoints/Level/SkeletonJoints_BuiltData.SkeletonJoints_BuiltData
LogSlate: Window 'SkeletonJoints_BuiltData' being destroyed
LogSlate: Window 'SkeletonJoints_BuiltData' being destroyed
LogUObjectHash: Compacting FUObjectHashTables data took   0.61ms
LogSlate: Window 'Save Content' being destroyed
LogFileHelpers: InternalPromptForCheckoutAndSave started...
LogUObjectHash: Compacting FUObjectHashTables data took   0.72ms
LogSavePackage: Moving output files for package: /NuitrackPlugin/Samples/SkeletonJoints/Level/SkeletonJoints
LogSavePackage: Moving 'F:/PROJECTS/MCD/MCD_BASE_FILE_9/MCD_02_27/Saved/SkeletonJoints2AACAF6943F966EB00BCCE9EDDF11DBB.tmp' to '../../Plugins/Marketplace/Nuitrack758041fa062bV5/Content/Samples/SkeletonJoints/Level/SkeletonJoints.umap'
LogFileHelpers: All files are already saved.
LogFileHelpers: Saving map 'SkeletonJoints' took 0.111
LogFileHelpers: InternalPromptForCheckoutAndSave took 190.661 ms
LogAssetEditorSubsystem: Opening Asset editor for World /NuitrackPlugin/Samples/SkeletonJoints/Level/SkeletonJoints.SkeletonJoints
Cmd: MAP LOAD FILE="../../Plugins/Marketplace/Nuitrack758041fa062bV5/Content/Samples/SkeletonJoints/Level/SkeletonJoints.umap" TEMPLATE=0 SHOWPROGRESS=1 FEATURELEVEL=4
LogWorld: UWorld::CleanupWorld for SkeletonJoints, bSessionEnded=true, bCleanupResources=true
LogSlate: InvalidateAllWidgets triggered.  All widgets were invalidated
LogAudio: Display: Audio Device unregistered from world 'None'.
LogUObjectHash: Compacting FUObjectHashTables data took   0.60ms
LogStreaming: Display: FlushAsyncLoading(332): 1 QueuedPackages, 0 AsyncPackages
LogAudio: Display: Audio Device (ID: 1) registered with world 'SkeletonJoints'.
LogChaosDD: Creating Chaos Debug Draw Scene for world SkeletonJoints
LogEditorServer: Finished looking for orphan Actors (0.000 secs)
LogUObjectHash: Compacting FUObjectHashTables data took   0.57ms
Cmd: MAP CHECKDEP NOCLEARLOG
MapCheck: Map check complete: 0 Error(s), 0 Warning(s), took 1.361ms to complete.
LogContentValidation: Display: Starting to validate 1 assets
LogContentValidation: Enabled validators:
LogContentValidation:     /Script/DataValidation.EditorValidator_Material
LogContentValidation:     /Script/DataValidation.DirtyFilesChangelistValidator
LogContentValidation:     /Script/DataValidation.EditorValidator_Localization
LogContentValidation:     /Script/DataValidation.PackageFileValidator
LogContentValidation:     /Script/DataValidation.WorldPartitionChangelistValidator
LogContentValidation:     /Script/InputBlueprintNodes.EnhancedInputUserWidgetValidator
AssetCheck: /NuitrackPlugin/Samples/SkeletonJoints/Level/SkeletonJoints Validating asset
LogRenderer: Recreating Persistent SBTs due to initializer changes: 
        NumShaderSlotsPerGeometrySegment changed: current: 1 - new: 2
        NumGeometrySegments changed: current: 0 - new: 512
LogChaosDD: Not creating Chaos Debug Draw Scene for world World_1
LogAssetEditorSubsystem: Opening Asset editor for Blueprint /NuitrackPlugin/Samples/SkeletonJoints/Blueprints/BP_Skeleton.BP_Skeleton
LogChaosDD: Not creating Chaos Debug Draw Scene for world World_2
LogStreaming: Display: FlushAsyncLoading(333): 1 QueuedPackages, 0 AsyncPackages
LogSlate: Took 0.000209 seconds to synchronously load lazily loaded font '../../../Engine/Content/Slate/Fonts/Roboto-BoldCondensed.ttf' (158K)
LogAssetEditorSubsystem: Opening Asset editor for Blueprint /NuitrackPlugin/Blueprints/BP_NuitrackManager.BP_NuitrackManager
LogChaosDD: Not creating Chaos Debug Draw Scene for world World_3
LogUObjectHash: Compacting FUObjectHashTables data took   1.36ms
LogFileHelpers: InternalPromptForCheckoutAndSave started...
OBJ SavePackage: Generating thumbnails for [0] asset(s) in package [/NuitrackPlugin/Samples/SkeletonJoints/Blueprints/BP_Skeleton] ([2] browsable assets)...
OBJ SavePackage: Finished generating thumbnails for package [/NuitrackPlugin/Samples/SkeletonJoints/Blueprints/BP_Skeleton]
LogSavePackage: Moving output files for package: /NuitrackPlugin/Samples/SkeletonJoints/Blueprints/BP_Skeleton
LogSavePackage: Moving 'F:/PROJECTS/MCD/MCD_BASE_FILE_9/MCD_02_27/Saved/BP_SkeletonF343D75F444B93F04C6101BED2A2D053.tmp' to '../../Plugins/Marketplace/Nuitrack758041fa062bV5/Content/Samples/SkeletonJoints/Blueprints/BP_Skeleton.uasset'
LogFileHelpers: InternalPromptForCheckoutAndSave took 126.567 ms (total: 317.228 ms)
LogContentValidation: Display: Starting to validate 1 assets
LogContentValidation: Enabled validators:
LogContentValidation:     /Script/DataValidation.EditorValidator_Material
LogContentValidation:     /Script/DataValidation.DirtyFilesChangelistValidator
LogContentValidation:     /Script/DataValidation.EditorValidator_Localization
LogContentValidation:     /Script/DataValidation.PackageFileValidator
LogContentValidation:     /Script/DataValidation.WorldPartitionChangelistValidator
LogContentValidation:     /Script/InputBlueprintNodes.EnhancedInputUserWidgetValidator
AssetCheck: /NuitrackPlugin/Samples/SkeletonJoints/Blueprints/BP_Skeleton Validating asset
LogEOSSDK: LogEOS: Updating Product SDK Config, Time: 1627.847412
LogEOSSDK: LogEOS: SDK Config Product Update Request Completed - No Change
LogEOSSDK: LogEOS: ScheduleNextSDKConfigDataUpdate - Time: 1627.944092, Update Interval: 318.225037
LogFileHelpers: InternalPromptForCheckoutAndSave started...
OBJ SavePackage: Generating thumbnails for [0] asset(s) in package [/NuitrackPlugin/Blueprints/BP_NuitrackManager] ([2] browsable assets)...
OBJ SavePackage: Finished generating thumbnails for package [/NuitrackPlugin/Blueprints/BP_NuitrackManager]
Cmd: OBJ SAVEPACKAGE PACKAGE="/NuitrackPlugin/Blueprints/BP_NuitrackManager" FILE="../../Plugins/Marketplace/Nuitrack758041fa062bV5/Content/Blueprints/BP_NuitrackManager.uasset" SILENT=true
LogSavePackage: Moving output files for package: /NuitrackPlugin/Blueprints/BP_NuitrackManager
LogSavePackage: Moving 'F:/PROJECTS/MCD/MCD_BASE_FILE_9/MCD_02_27/Saved/BP_NuitrackManagerF0E3DC3C457843047A96E0A69EFC4A8D.tmp' to '../../Plugins/Marketplace/Nuitrack758041fa062bV5/Content/Blueprints/BP_NuitrackManager.uasset'
LogFileHelpers: InternalPromptForCheckoutAndSave took 97.939 ms (total: 415.167 ms)
LogContentValidation: Display: Starting to validate 1 assets
LogContentValidation: Enabled validators:
LogContentValidation:     /Script/DataValidation.EditorValidator_Material
LogContentValidation:     /Script/DataValidation.DirtyFilesChangelistValidator
LogContentValidation:     /Script/DataValidation.EditorValidator_Localization
LogContentValidation:     /Script/DataValidation.PackageFileValidator
LogContentValidation:     /Script/DataValidation.WorldPartitionChangelistValidator
LogContentValidation:     /Script/InputBlueprintNodes.EnhancedInputUserWidgetValidator
AssetCheck: /NuitrackPlugin/Blueprints/BP_NuitrackManager Validating asset
LogDebuggerCommands: Repeating last play command: Selected Viewport
LogPlayLevel: PlayLevel: No blueprints needed recompiling
LogPlayLevel: Display: Creating online subsystem for client :Context_7
LogOnline: OSS: Created online subsystem instance for: :Context_7
LogPlayLevel: Creating play world package: /NuitrackPlugin/Samples/SkeletonJoints/Level/UEDPIE_0_SkeletonJoints
LogPlayLevel: PIE: StaticDuplicateObject took: (0.001976s)
LogPlayLevel: PIE: Created PIE world by copying editor world from /NuitrackPlugin/Samples/SkeletonJoints/Level/SkeletonJoints.SkeletonJoints to /NuitrackPlugin/Samples/SkeletonJoints/Level/UEDPIE_0_SkeletonJoints.SkeletonJoints (0.002029s)
LogUObjectHash: Compacting FUObjectHashTables data took   1.33ms
LogChaosDD: Creating Chaos Debug Draw Scene for world SkeletonJoints
LogPlayLevel: PIE: World Init took: (0.001924s)
LogAudio: Display: Creating Audio Device:                 Id: 4, Scope: Unique, Realtime: True
LogAudioMixer: Display: Audio Mixer Platform Settings:
LogAudioMixer: Display:     Sample Rate:                          48000
LogAudioMixer: Display:     Callback Buffer Frame Size Requested: 1024
LogAudioMixer: Display:     Callback Buffer Frame Size To Use:    1024
LogAudioMixer: Display:     Number of buffers to queue:           1
LogAudioMixer: Display:     Max Channels (voices):                32
LogAudioMixer: Display:     Number of Async Source Workers:       4
LogAudio: Display: AudioDevice MaxSources: 32
LogAudio: Display: Audio Spatialization Plugin: None (built-in).
LogAudio: Display: Audio Reverb Plugin: None (built-in).
LogAudio: Display: Audio Occlusion Plugin: None (built-in).
LogAudioMixer: Display: Initializing audio mixer using platform API: 'XAudio2'
LogAudioMixer: Display: Using Audio Hardware Device Headphones (High Definition Audio Device)
LogAudioMixer: Display: Initializing Sound Submixes...
LogAudioMixer: Display: Creating Master Submix 'MasterSubmixDefault'
LogAudioMixer: Display: Creating Master Submix 'MasterReverbSubmixDefault'
LogAudioMixer: FMixerPlatformXAudio2::StartAudioStream() called. InstanceID=4
LogAudioMixer: Display: Output buffers initialized: Frames=1024, Channels=2, Samples=2048, InstanceID=4
LogAudioMixer: Display: Starting AudioMixerPlatformInterface::RunInternal(), InstanceID=4
LogInit: FAudioDevice initialized with ID 4.
LogAudioMixer: Display: FMixerPlatformXAudio2::SubmitBuffer() called for the first time. InstanceID=4
LogAudio: Display: Audio Device (ID: 4) registered with world 'SkeletonJoints'.
LogAudioMixer: Initializing Audio Bus Subsystem for audio device with ID 4
LogLoad: Game class is 'GameModeBase'
LogWorld: Bringing World /NuitrackPlugin/Samples/SkeletonJoints/Level/UEDPIE_0_SkeletonJoints.SkeletonJoints up for play (max tick rate 0) at 2026.03.02-09.10.49
LogWorld: Bringing up level for play took: 0.000760
LogTemp: Display: Nuitrack Start OK
LogTemp: Display: Connected devices: 1
PIE: Server logged in
PIE: Play in editor total start time 2.046 seconds.
LogRenderer: Recreating Persistent SBTs due to initializer changes: 
        NumShaderSlotsPerGeometrySegment changed: current: 1 - new: 2
        NumGeometrySegments changed: current: 0 - new: 512
LogBlueprintUserMessages: [Skeleton_C_0] 0
LogBlueprintUserMessages: [Skeleton_C_0] 0
LogBlueprintUserMessages: [Skeleton_C_0] 0
LogBlueprintUserMessages: [Skeleton_C_0] 0
LogBlueprintUserMessages: [Skeleton_C_0] 0
LogBlueprintUserMessages: [Skeleton_C_0] 0
LogBlueprintUserMessages: [Skeleton_C_0] 0
LogBlueprintUserMessages: [Skeleton_C_0] 0
LogBlueprintUserMessages: [Skeleton_C_0] 0
LogSlate: Updating window title bar state: overlay mode, drag disabled, window buttons hidden, title bar hidden
LogWorld: BeginTearingDown for /NuitrackPlugin/Samples/SkeletonJoints/Level/UEDPIE_0_SkeletonJoints
LogWorld: UWorld::CleanupWorld for SkeletonJoints, bSessionEnded=true, bCleanupResources=true
LogSlate: InvalidateAllWidgets triggered.  All widgets were invalidated
LogPlayLevel: Display: Shutting down PIE online subsystems
LogSlate: InvalidateAllWidgets triggered.  All widgets were invalidated
LogSlate: Updating window title bar state: overlay mode, drag disabled, window buttons hidden, title bar hidden
LogAudioMixer: Deinitializing Audio Bus Subsystem for audio device with ID 4
LogAudioMixer: Display: FMixerPlatformXAudio2::StopAudioStream() called. InstanceID=4, StreamState=4
LogAudioMixer: Display: FMixerPlatformXAudio2::StopAudioStream() called. InstanceID=4, StreamState=2
LogUObjectHash: Compacting FUObjectHashTables data took   1.68ms
LogPlayLevel: Display: Destroying online subsystem :Context_7
LogEOSSDK: LogEOS: Updating Product SDK Config, Time: 1973.318115
LogEOSSDK: LogEOS: SDK Config Product Update Request Completed - No Change
LogEOSSDK: LogEOS: ScheduleNextSDKConfigDataUpdate - Time: 1973.432495, Update Interval: 311.134979
LogChaosDD: Not creating Chaos Debug Draw Scene for world World_4
LogChaosDD: Not creating Chaos Debug Draw Scene for world World_5
[2325.68][119]LogEOSSDK: LogEOS: Updating Product SDK Config, Time: 2317.259277
[2325.81][134]LogEOSSDK: LogEOS: SDK Config Product Update Request Completed - No Change
[2325.81][134]LogEOSSDK: LogEOS: ScheduleNextSDKConfigDataUpdate - Time: 2317.384277, Update Interval: 325.498230

Stepan.Reuk · March 2, 2026, 4:23pm

Hmm… there is no Color Frames on the panel in the middle. Did you turn it off?

Also check that the RealsenseViewer program shows that the sensor is connected via USB 3

alin · March 2, 2026, 5:01pm

@Stepan.Reuk
I turned off color frames for privacy reasons.

I will double check the RealSenseViewer, but I am sure that it is USB 3

Gesture & Fitting room levels work, it is only the Skeleton Joints Level that does not work.

Please help me understand how to troubleshoot this.

alin · March 3, 2026, 3:29am

Hi @Stepan.Reuk changing the cable has helped!! Though this sensor may not be best. I am going to test others from your list. Thank you so much for your support!