Unreal Engine Issues

Runtime Virtual Texture rendering can allocate more FRDGBuffers than expected

When rendering runtime virtual texture pages without throttling (when r.VT.MaxUploadsPerFrame is high or during Movie RenderQueue captures) the number of FRDGBuffers allocated by the Render Graph Bu ...

AnimNotify Issue with LevelSequencer Actor with URO

Sometimes AnimNotify does not fire when an animation is executed under the following conditions. 1. The CharacterMesh's AnimationMode uses UseAnimationAsset 2. CharacterMesh's URO is enabled (Enable ...

Foliage LOD's Screen Size Can't be Set Higher Than 1.5

Foliage LOD's Screen Size Can't be Set Higher Than 1.5 Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 4827620, 5.1 CL 20024840 ...

Crash when Background Blur is added with Instanced Stereo enabled

AfterMotionBlur Translucent Material With Local Exposure Enabled Causing Artifacts

When TSR is enabled, translucent materials using the AfterMotionBlur translucency pass cause visual artifacts when local exposure is active. The artifacting is believed to occur because the local ex ...

MultiProcessCook Shader Symbols fail to write when two workers race and try to write them at the same time

When shadersymbols are requested, cooking shaders writes the symbol files into {Project} /Saved/ShaderSymbols/<PlatformName>. These symbols are written by the function FShaderSymbolExport::Write ...

Visual Noise on Thin Translucent materials with a Directional Light

Regression in testing This occurs with hardware and software ray tracing, as well as moveable and static lights This occurs regardless of anti aliasing. This was tested with DX12 ...

Custom fallback mesh LODs for Nanite-enabled meshes not working

Creating a custom fallback mesh with LOD for Nanite-enabled meshes with multiple materials, results in mesh LODs with errors. As the number of material sections (material slots) decreases with coars ...

Blend Stack node doesn't have a valid FDeltaTimeRecord

The blend stack node doesn't generate any values for its DeltaTimeRecord.  This can be tested with the fix for [Link Removed] shelved at 32747789.  Since there isn't a tick record directly associate ...

Bake Pose is not applied correctly when using LODSettings asset

The Bake Pose setting does not work when using a SkeletalMesh LODSettings asset. After the change in CL22878911, the BasePose in the LODSettings asset is no longer copied to the BakePose in the skel ...