Unreal Engine Issues
Unreal Engine Issues
Crash on BP recompile after deleting struct property with instanced object
UE - Framework - Blueprint Compiler - Jan 5, 2023A user has reported a crash that is reproducable in a clean project in UE 5.1.0 release. It involves a struct with an instanced object. The crash occurs after deleting a property of that struct type ...
Custom Depth range is different than Pixel Depth range
UE - Rendering - Features - Sep 25, 2025Shaders that compare custom depth and pixel depth get wrong output values because the ranges are different. This error is most noticeable over large distances. The difference in ranges is due to t ...
[CrashReport] UE4Editor_UnrealEd!FAssetEditorToolkit::InitAssetEditor() [asseteditortoolkit.cpp:62]
Tools - Aug 29, 2017This is an infrequent crash occurring for users in 4.17. Users have not provided any descriptions of their actions when the crash occurred. The callstack is the same as in [Link Removed], but that ...
[CrashReport] UE4Editor-D3D12RHI!FD3D12DescriptorCache::SetConstantBuffers<0>(FD3D12RootSignature const *,FD3D12ConstantBufferCache &,unsigned short const &) [D3D12DescriptorCache.cpp:752]
UE - Rendering - Architecture - RHI - Apr 12, 2019Generated from CrashReporter ...
FMassMoveTargetFragment::CreateNewAction does not update PreviousAction, breaking the start-of-path avoidance fade and related behavior for MassEntity crowds
UE - Runtime - Character - Jul 28, 2026In MassEntity-based crowds, when an agent transitions from Stand to Move and begins walking, the Avoidance trait parameters StartOfPathDuration and StartOfPathAvoidanceScale, which are meant to temp ...
WASM HTML5 Runs out of Memory in Chrome versions 58+ on Windows
UE - Platform - Mobile - May 5, 2017We were seeing out-of-memory errors when launching on Chrome version 58 on Windows (both 32-bit and 64-bit). After some investigation, the root cause appears to be a regression introduced in Chrome ...
AncientGame's fire is quite ghosty with r.SeparateTranslucency=0
UE - Rendering - Features - Nov 8, 2022Scale is 0.0f when editing a curve with Animation Sequencer.
UE - Anim - Runtime - Jun 6, 2018There are conditions. ・EnableRootMotion is true. ・Adidive Anim Type is Mesh Space or Local Space. https://udn.unrealengine.com/questions/436446/%E7%89%B9%E5%AE%9A%E6%9D%A1%E4%BB%B6%E3%81%AE%E3% ...
Significant Refraction Differences between 4.27 and 5.0
UE - Rendering - Architecture - Materials - Apr 25, 2022Level Instances appear at the origin on Linux cooks
UE - Engine Scaling - Streaming - Level Instances - Aug 14, 2024Level Instances are spawned in the origin (0,0,0) after making a packaged build in Linux ...