Dragging control rig Blueprint onto a sequence will fail to create a new spawnable

UE - Anim - Sequencer - Jun 9, 2021

The class FControlRigObjectSpawner is set-up to spawn control rigs from a sequence, but it fails to implement and override for CreateNewSpawnableType, so spawnables can only be created by converting ...

Crash when using EditConditionHides with a struct in an array

UE - Editor - UX - Jun 8, 2021

A crash can occur in FStructurePropertyNode::GetValuePtrOfInstance when using EditConditionHides with arrays of structs. When deleting an element from the array, ParentBaseAddress will be null. ...

Crash when sculpting on duplicated landscape with edit layers enabled

UE - LD & Art - Modeling Tools - Landscape - Jun 8, 2021

Crash happens when trying to sculpt on a duplicated landscape that has edit layers enabled. This crash does not occur for landscapes that are duplicated with edit layers disabled. ...

Shader compilation error occurs when using values sampled from texture for Customized UV1

UE - Rendering - Jun 3, 2021

Shader compilation error occurs when using values sampled from texture for Customized UV1. No problem when connected to Customized UV0. This problem compiles well if I change the value of Const to ...

MergeActors Proxy Tool Outputs Incorrect Result with HISMC

UE - LD & Art - World Building - Merge Actor - Jun 1, 2021

Running the MergeActors proxy tool on an actor that has an HISMC and both its scale and rotation changed will output a proxy incorrectly. ...

r.MaxAnisotropy does not work in editor

UE - Rendering - May 21, 2021

Setting r.MaxAnisotropy by console in editor has no effect on texture sampler's MaxAnisotropy. If the startup value of r.MaxAnisotropy is 8, then the MaxAnisotropy is always 8 no matter how  r.MaxA ...

FileSystemDerivedDataBackend may output a corrupted access log

UE - Foundation - Core - Derived Data - May 20, 2021

This problem is caused by the AccessLogWriter has not been flushed at the termination. The following workaround flushes the Writer.class FFileSystemDerivedDataBackend : public FDerivedDataBackendInt ...

UTexture2D cannot be inherited via plugin

UE - Rendering - RHI - May 18, 2021

When compiled, linker errors appear 1>LensDistortionBlueprintLibrary.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl UTexture2D::Serialize(class FArchive &)" (?Ser ...