Unreal Engine Issues
Unreal Engine Issues
GPU-ARM Mali 400 series phones will render an Opaque Unlit Material as black
UE - Platform - Mobile - Feb 12, 2016ARM Mali 400 Series GPUs are rendering Opaque Unlit Materials as Black instead of the designated color. This is a *regression* from 4.10.2.Devices where Issue OccursDevice NameBrandBug Description ...
ISM + WPO = broken motion vectors?
UE - Graphics Features - Nov 5, 2024Instanced Static Meshes will have incorrect velocity if a Material uses World Position Offset. Fixed WPO in a material causes significant velocity on the ISM. This was also replicated in //UE5/Rele ...
TMap<Bool is disallowed despite bool having a hash
UE - Gameplay - Blueprint - Nov 22, 2022Reproduced 3/3 times. User is unable to create a new TMap with bool key through Blueprints (which is the expected result). Issue is technically a Regression, as the ensure does not occur in //UE5/ ...
FileSystemDerivedDataBackend may output a corrupted access log
UE - Foundation - Core - Derived Data - May 20, 2021This problem is caused by the AccessLogWriter has not been flushed at the termination. The following workaround flushes the Writer.class FFileSystemDerivedDataBackend : public FDerivedDataBackendInt ...
The engine crashes when adding a new brush at newly created level by a specific way.
UE - LD & Modeling - Modeling Tools - Mesh Editing - Jun 17, 2019issuesFBSPOps::csgAddOperation returns null if BuilderBrush has no valid polys.The creating level on content browser never calls "UEditorEngine::InitBuilderBrush(NewWorld);". But "New level" button o ...
Attaching New Camera Actor to Spring Arm Component does not set the Location Correctly
UE - Gameplay - Blueprint - Apr 2, 2015After adding a new Camera Actor Component within Blueprints to an existing Spring Arm Component, the Camera Component adopts the location settings , but does not set its location within the viewport ...
[CrashReport] UE4Editor_Engine!FSkeletalMeshObject::UpdateMinDesiredLODLevel() [skeletalrender.cpp:81]
OLD - Anim - Nov 2, 2017This is a somewhat common crash that has occurred since at least the 4.16 release. User DescriptionsReimported a skeletal mesh from an FBX file.reimported static mesh Source Context 70 v ...
Behavior of Speed Up/Down parameter of Auto Exposure are different.
UE - Graphics Features - Apr 5, 2016Brend/Swtch multi PostProcessVolume to handle Auto Exposure with same Speed Up/Down parameter but behavior of Speed Up/Down parameter of Auto Exposure are different. Scene with. Unbounded PostProce ...
Landscape has a seam when scale is set to a decimal
UE - Graphics Tools - Terrain - Landscape - Jan 13, 2023Regression: Tested in UE5/Release-5.0 at CL 20979098, this issue does occur so it is not a regression. This issue occurs if the scale set for the landscape has a decimal value that is not 0.5. Sett ...
Duplicating / Moving (to another level) an actor with a Hierarchical Instanced Static Mesh component causes a crash
UE - Graphics Features - Nov 14, 2016When you have an actor with a Hierarchical Instanced Static Mesh component that has a Static Mesh set and is populated with at least 1 instance and then duplicate it or move it to another level, it ...