Unreal Engine Issues
Unreal Engine Issues
Incorrect mesh deformation when Max World Position Offset Displacement used
UE - Graphics Features - Nanite - Feb 12, 2025When Vertex Animated Texture is used to animate a mesh with World Position Offset, often the Max World Position Offset Displacement Material setting must be increased or the Bounds Scale increased, ...
MoverExamples: characters have 1-frame unnecessary extra input latency
UE - Gameplay - Player Movement - Mover - Mar 6, 2024Due to the way input is handled on the MoverExamplesCharacter, including AnimatedMannyPawn, we have a delay in the time between when an input event occurs and when it is ingested by the movement sim ...
FName no longer equals FName_None when constructed with a trailing underscore and digits in range of 1-9
UE - CoreTech - Apr 15, 2025When an FName is created with a trailing underscore and any number of digits in the range of 1-9 the trailing digits are used as the internal number value for the FName lookup. This results in the F ...
ChaosWheeledVehicleMovementComponent is breaking the const CDO contract and changes to the instances are being applied to the CDO
UE - Simulation - Physics - Apr 28, 2025As described by the licensee, the const CDO contract is being broken on ChaosWheeledVehicleMovementComponent. The issue the licensee is facing is that by spawning cars with different configurations, ...
Changes to Instanced Properties default value on BP not propagated to placed actors in the opened level
UE - Foundation - May 15, 2025In UE versions 5.4 and onwards (as of CL 42589677 in Main), when an Instanced UObject property is defined in an Actor Blueprint, modifying the default value in the Blueprint does not propagate the c ...
Anim State Notifies Don't Consistently Fire Begin/End Events for Looping Anim Sequences
UE - Anim - Runtime - Anim Blueprints - Jun 9, 2025If you have an Animation Notify State and set it up on an animation to start at the exact beginning of the anim sequence and finish exactly at the end (I have attached a picture of this). It doesn't ...
Niagara Scalability Crash When Processing Significance
UE - Niagara - Jun 4, 2025Method FNiagaraScalabilityManager::ProcessSignificance() iterates on indices from Context.SignificanceIndices and uses them to access the State and ManagedComponents arrays. It can then decide to cr ...
Enabling Wireframe Mode along with HDR (EyeAdaptation) Visualization crashes the Editor
UE - Graphics Features - May 29, 2025In the Viewport, enabling Wireframe Mode (ALT+2) along with HDR (EyeAdaptation) Visualization crashes the Editor. I've tested different versions and this issue is not present on 5.0, but it reproduc ...
[Waveform Editor] - Waveform Editor has noticeable latency with larger files [investigate/profile only for now]
UE - Audio - WaveformEditor Plugin - Sep 19, 2022I've noticed as I've been working with the Wave Form Editor, that it works fairly well for smaller files, but on longer assets there can be some pretty noticeable latency when adding and adjusting t ...
[Debug Tools][Crash] - Enabling au.editor.ForceAudioNonStreaming causes editor to crash the next time the user PIEs
UE - Audio - Stream Caching - May 31, 2022Encountered while going through some debug commands. Repro 3/3. Crash Reporter Link: [Link Removed]Assertion failed: ChunkIndex != 0 [File:E:\User\Engine\Source\Runtime\Engine\Private\AudioStreaming ...