Investigate render flush at SkeletalMeshComponent InitLODInfos

UE - Anim - Rigging - Apr 19, 2023

From UDN : we are spawning a number of characters at the same time during the game, and seeing a major framerate hitch when we do so. After the characters have been spawned, we use SetSkinnedAssetA ...

Foot Placement Node does not account for Mesh and Actor Scale

UE - Anim - Runtime - Anim Blueprints - Jun 17, 2025

When scaling down the character in the Game Animation Sample to 0.1 (Actor Scale or Mesh Scale), the lower body becomes crouches, not taking into account the difference in pelvis and foot difference ...

Cannot package project on Linux

UE - Platform - Linux - Mar 18, 2015

Trying to package a blank project on Linux fails. ...

MAC: Crash on startup

UE - Platform - Apple - Apr 10, 2015

"MacBook pro 13 2015 with yosemite 10.10.3 just crashed after launching ue4." The problem is that the recently introduced calls to IsRHIDeviceNVIDIA occur before the Mac code sets the GRHIVendorID ...

Crash importing FBX

UE - Editor - Content Pipeline - Import and Export - Jan 7, 2015

User reporting as a 4.7 Bug, but no crash report for this bug available for 4.7. Same bug found reported for 4.6.1: Crash Report: [Link Removed] [Code] <unknown module>! KERNELBASE!RaiseExceptio ...

White Box Appear When Changing Screen Resolution on Standalone

White box appear when changing screen resolution on standalone. ...

Precompile occurs in Niagara when Standalone is started, increasing load time.

UE - Niagara - Mar 11, 2021

In 4.26.1, if you remove the collision module from NiagaraSystem, the Precompile will not occur. ...

FFrame::ReadProperty() occur crash if Blendspace Player node use Function to get BlendSpace Asset

UE - Anim - Runtime - Anim Blueprints - May 25, 2022

If user connect a function that returns a Blendspace Asset to a Blendspace Player that BlendSpaceAsset settings are exposed to a pin, it crashes in the package. It does not occur if user do not con ...

HLOD build crashes when GroupActor is present

UE - World Creation - Worldbuilding Tools - HLOD - May 24, 2022

The licensee shared information that a Null check on the following Actor can be used as a workaround. static TArray<UActorComponent*> GatherHLODRelevantComponents(const TArray<AActor*>& InSourceAct ...

Jump Animation for FPS template character breaks on land

OLD - Anim - May 6, 2015

When jumping in the first person template project, the "is in air" animation continues to play after landing. Solution: Switching out the "FirstPerson_JumpStart Asset" node for the "FirstPerson_J ...