Unreal Engine Issues
Unreal Engine Issues
Inherited component properties on actor instances of derived blueprints are silently reset to defaults when the blueprint enters a compile error state and is subsequently fixed
UE - Framework - Blueprint Compiler - Mar 6, 2026When an instance of a child blueprint in a level enters the “Bad Blueprint” state due to a compile error it will reset to default values when it is restored after the compile error has been fixed. ...
Vehicle destroyed when long stiff value is set to 0
UE - Simulation - Physics - Jan 3, 2019When setting the Long Stiff value to 0 for wheels it appears to destroy the actor as soon as the wheel come in contact with the ground ...
Setting scale to 0 in any direction breaks overlap events
UE - Simulation - Physics - May 26, 2015When the scale of an actor is set to 0 in either X, Y or Z any overlap events will fail to trigger overlap events. ...
PVRTC texture is sampled as white when the uv value is very close to 0
UE - Platform - Mobile - Systems - Oct 20, 2021When the uv value is very close to 0 ( < 0.001 ), the boundary value of the PVRTC texture is sampled as white. please refer to attached images and sample project. problem goes away when changing th ...
[5.8] Cherry-pick CL 55798320: re-precache PSOs in ULandscapeComponent and UGroomComponent OnRegister (fixes bPSOPrecacheCalled ensure on re-register)
UE - Rendering - RHI - Oct 21, 2026In 5.8, UPrimitiveComponent::OnUnregister resets FPSOPrecacheComponentData, which clears bPSOPrecacheCalled (regression from CL 48140040). ULandscapeComponent and UGroomComponent only call PrecacheP ...
FDeferredDecalProxy cannot be initialized to not fade even if FadeDuration is set to 0
UE - Rendering - Architecture - May 16, 2024FDeferredDecalProxy always fade because InitializeFadingParameters is always called and leaves InvFadeDuration at 1.0 and the LifetimeAlpha calculation in FDeferredDecalPS::SetParameters gets a very ...
Tessellated Materials Displayed as 0 in Shader Complexity ViewMode
UE - Graphics Features - Sep 11, 2019Tessellated Materials Displayed as 0 in Shader Complexity ViewMode. Found in 4.22 CL# 7053642, 4.23 CL# 8386587, 4.24 CL# 8588088 ...
Crash While Running Project With d3ddebug Enabled (fix provided)
UE - Graphics Features - Mar 6, 2017A licensee encountered a crash during InjectTranslucentLightArray: according to them they fixed the issue in ShadowProjectionCommon.usf: /** Cube map texture. */ TextureCube<float> ShadowDepthCub ...
Duplicating Asset With Suffix 0 Will Jump To A Suffix Of 2
Tools - Oct 28, 2016When duplicating an asset with the suffix 0 in the content browser the duped asset will get a suffix of 2. Any other number works fine for example if you dupe an asset named "Test_23" the duped mesh ...
UAnimInstance::GetInstanceTransitionTimeElapsed returning 0 in non-editor builds
OLD - Anim - Sep 4, 2019In non-editor builds UAnimInstance::GetInstanceTransitionTimeElapsed always returns 0.0f. This is caused within FAnimNode_StateMachine::Update_AnyThread due to: #if WITH_EDITORONLY_DATA NewTra ...