Unreal Engine Issues

Apply mesh paint Blueprint instance changes and save fails

After mesh painting on a BP Static Mesh Actor, and "Apply instance changes to Blueprint" the added virtual texture is removed with the log:LogTexture: Display: Building texture TwoD: /Game/FirstPers ...

Rare crash in FWidgetAnimationState::OnStopped

The FWidgetAnimationState::OnStopped delegate is getting created when the widget anim state is being destroyed and then queued to be executed later. Something is happening between the queue and the ...

Memory leak with -renderoffscreen and uncapped frame rate

A customer reported that -renderoffscreen leaks when running with an uncapped frame rate ...

'Use focal length' checkbox resets on reopening file

Crash when using ListStreamingTextures with VirtualTexturePrefetchMips

The ListStreamingTextures command causes a crash in FRenderAssetStreamingManager::HandleListStreamingRenderAssetsCommand when there is a virtual texture that uses crashes when encountering one of t ...

Substrate Single Layer Water material fails to compile in blendable Gbuffer mode when using the Single Layer Water BSDF node

When using Substrate in Blendable GBuffer mode, a material with the single layer water BSDF node produces a shader compiler error : MaterialEditorStats: Error: [SM6] Shader debug info dumped to: "\ ...

Non-Nanite meshes not being correctly cleared from all levels of VSMs on actor destruction when r.Shadow.Virtual.NonNanite.IncludeInCoarsePages=0

When using the r.Shadow.Virtual.NonNanite.IncludeInCoarsePages=0 to optimize VSM performance there are errors in how the VSM is invalidated when actors are destroyed with non-Nanite meshes. The curr ...

Crash when applying Decal material with Distance Cull Fade node to Decal Actor

The Editor crashes when applying a Material with a Distance Cull Fade node to a Decal Actor. Fatal error: [Link Removed] [Line: 730] Missing uniform buffer at slot 2, stage SF_Pixel. Please check ...

AbilitySystemComponent::RepAnimMontageInfo causing push model validation ensure

When iterating through the struct’s properties to check if the values have remained the same, it seems as though the SectionIdToPlay has changed, causing validation to fail (see attached log snippet ...

[StateTree] StateTree fails to transition to the next state in child states when parent state contains some tasks

StateTree fails to transition to the next child state in a tree where the parent state has a task such as Debug Text which does not influence state completion. The ST atttempts to transition from Le ...