Unreal Engine Issues
Unreal Engine Issues
Geometry Collection (GC) fragments are affecting the Navmesh in wrong positions
UE - Simulation - Visual - Dec 6, 2024Geometry Collection (GC) fragments are affecting the Navmesh in wrong positions and the identified cause is wrong indexing. Once a GC breaks, it's fragments, when big enough, are creating islands in ...
When used with First Loop Start Frame Offset and Use Animation Blueprint, the character will alternate between the specified animation and the reference pose
UE - Anim - Anim in Engine - Jan 30, 2023If you use StartFrameOffset set to 1 or higher in conjunction with the Use Animation Blueprint, the character's animation will be rough towards the end of the section. Specifically, it seems that th ...
Paper2D performance regression due to TArray resizing
UE - Graphics Features - Aug 16, 2019We've noticed after upgrading our heavy Paper2D project to 4.22 that tilemap performance has been massively degraded compared to previous versions. After some digging we found out that it's due to a ...
Open Formats: Interchange Import Runtime - Interchange ImportAssetAsync runtime GLB import — materials, textures, tangents, and shaders non-functional in packaged builds (6 issues, UE 5.7.4)
UE - Editor - Open File Formats - Apr 30, 2026Description* We are using Interchange's `UInterchangeManager::ImportAssetAsync()` to import GLB files at runtime in a packaged (Shipping) application. The orchestration layer (`ImportInternal` in `In ...
FViewElementPDI::DrawLine calls for SDPG_World are not rendered in PIE or in Game
UE - Rendering - Architecture - RHI - Jan 7, 2026When View.Family->EngineShowFlags.CompositeEditorPrimitives is false in the function RenderEditorPrimitivesForDPG. This code picks which version of the batched lines to renderconst FBatchedElements ...
Crash on map change with non-null values for GPropertyColorationClass and request customizable property coloration color
UE - Editor - Workflow Systems - Aug 7, 2023This was found by a customer through a UDN, and they offered the fix for it, as well. The basic steps to reproduce the crash are as follows:call GEditor->SetPropertyColorationTarget(...) somewhere i ...
Structs cause packaging to fail when Blueprint Nativization Method is set to "Inclusive"
UE - Gameplay - Blueprint - Apr 26, 2017Structs cause packaging to fail when Blueprint Nativization Method is set to "Inclusive" Note: Appears to be a regression (worked in 4.15.1) Error example: UATHelper: Packaging (Windows (64-bit)) ...
Force front x imported asset incorrectly display axis for thumbnail and default editor camera
UE - Editor - Content Pipeline - Import and Export - Apr 12, 2021Thumbnail can be fix by (Quote from UDN) "adjusting OrbitYaw of the ThumbnailInfo for the +X-facing skeletal mesh" Persona Editors can be fix by (Quote from UDN) "setting SkeletalMesh->SetHasCustom ...
Render Target Is Jittery/Blurry When Used With A Scene Capture Component
UE - Graphics Features - Sep 19, 2019Render Target is Jittery and Blurry When Used with a Scene Capture Component. Found in 4.23 CL# 8386587, 4.234 CL# 8748719 This is a regression. ...
Changing the case of any node with a String input will not be saved
UE - Gameplay - Blueprint - Apr 20, 2016Changing the case of any node with a String input will not be saved User Description: Changing case of any string input in BP not accepted But the problem is still happened on any string input of ...