Unreal Engine Issues
Unreal Engine Issues
Wrong WPO motion vectors due to Periodic World Space node
UE - Rendering - Graphics Features - May 13, 2026We've noticed smearing in grass due to wrong motion vectors. This appears to be caused by lack of previous frame support in the periodic world space node. This is how we fixed it: In MaterialTempl ...
Pasting custom data floats from a text editor into a instanced static mesh component crashes the editor
UE - Framework - Components - Aug 5, 2024When an instanced static mesh component with a material using a PerInstanceCustomData node has its data floats pasted in, the editor crashes with an "Array index out of bounds" error. The licensee w ...
Crash on opening Sequence Director for Level Sequence
UE - Gameplay - Blueprint - Oct 15, 2020Within the project attached, the Sequence Director can not be opened for the Level Sequence "SkateReel Sequencer Crash." The user reports being able to open the Sequence Director prior to copying an ...
[CrashReport] UE4Editor_UnrealEd!ObjectTools::ForceDeleteObjects() [objecttools.cpp:2097]
UE - Gameplay - Blueprint - Aug 8, 2016This JIRA is being entered as a result of it being one of the top crashes occurring in 4.13 Preview 1. Error message: Ensure condition failed: Lhs.CurrentNum == Lhs.InitialNum [Link Removed] [Line ...
Crash when changing a Play Node's "Sequence" to a Montage
OLD - Anim - Jan 20, 2016I understand that this is not something you're intended to be able to do (Montages aren't used this way), but we should bar the user from inserting a montage into this variable slot. Crash occurs w ...
[CrashReport] Mac crash - UE4Editor-Slate.dylib!FTextLayout::GetAsTextAndOffsets()
UE - Platform - Apple - Aug 15, 2017This is a trending Mac crash in 4.17.0 that also had some occurrence in 4.16. Users have not provided any descriptions of their actions when the crash occurred, but the callstack is nearly identica ...
It is possible to rename a Function Output the same as a Local Variable, which causes a compile error
UE - Gameplay - Blueprint - Apr 15, 2015It is possible to rename a Function Output the same as a Local Variable, which causes a compile error: Error Internal Compiler Error: Tried to create a property TestVar in scope NewFunction_0, but ...
[CrashReport] Mac crash - UE4Editor-Slate.dylib!FSlateEditableTextLayout::FTextInputMethodContext::GetSelectionRange()
UE - Platform - Apple - Aug 15, 2017This is a trending Mac crash coming out of the 4.17.0 release, but also seems to have occurred in 4.16. Users have not provided any descriptions of their actions when the crash occurred. The callst ...
CRASH: Random Crashes: Access violation - code c0000005
UE - Gameplay - Blueprint - Dec 30, 2014Crash Report: [Link Removed] UE4Editor_CoreUObject! UPackage::SavePackage() + 23952 bytes savepackage.cpp:3305 UE4Editor_UnrealEd! UEditorEngine::SavePackage() + 1065 bytes editor.cpp:4368 UE4Edi ...
EPixelFormat::PF_R16_SINT does not render correctly for textures
UE - Rendering - Architecture - RHI - Nov 18, 2019Creating a UTexture2D the following way does not properly process gradients in the texture: ------ bool Atexture_test_actor::LoadRawFileTest( /* output */ UTexture2D*& image) { TArray<short> v ...