Unreal Engine Issues
Unreal Engine Issues
Proxy Table allows creating a Nested Chooser, but Edit does not open it
UE - Runtime - Animation - Nov 3, 2026A Proxy Table entry allows selecting Nested Chooser and creating an embedded Chooser Table. The new Chooser's name appears in the entry, but clicking Edit does not open it, preventing us from config ...
Mutable Make mesh - Higher level LODs meshes appearing in lower LODs
UE - Runtime - Mutable - Oct 28, 2026Due to 5.8 changes of the node Skeletal Mesh Make where it used to have the option of either automatically collect the LOD meshes from the Section skm or to use manually where it new to use the skm ...
Editor crash (unhandled assert) when changing blend mode on a material assigned to a Nanite static mesh
UE - Rendering - Features - Nanite - Oct 23, 2026POST LINK: https://forums.unrealengine.com/t/editor-crash-unhandled-assert-when-changing-blend-mode-on-a-material-assigned-to-a-nanite-static-mesh/2764048 POST BODY:Summary Changing a material's Bl ...
(Linux) - Editor crashes out when any change in project files
UE - Rendering - RHI - Oct 23, 2026POST LINK: https://forums.unrealengine.com/t/linux-editor-crashes-out-when-any-change-in-project-files/2733237 POST BODY:Summary Ue 5.8 Fresh install and basically fresh project. Any time Ue detec ...
FFT bloom disappears for some kernel/viewport size combinations (survey grid sized for R instead of 2R)
UE - Rendering - Features - Oct 22, 2026FFT bloom (convolution bloom) renders nothing for some combinations of kernel size, r.Bloom.ScreenPercentage and viewport sizes (e.g. 50% and 1024 x 768)Root cause PostProcessFFTBloom.cpp computes ...
Substrate Adaptive GBuffer: HWRT Hit Lighting drops indirect lighting from lights with a Light Function (GI / Reflections)
UE - Rendering - Features - Shading Models - Oct 22, 2026The Light Function variant of the hit lighting miss shader is compiled as the Light Function material, so MATERIAL_IS_SUBSTRATE=1. This makes it read the ray hit surface from the payload incorrectly ...
[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 ...
Distance field PrimitiveModifiedBounds grows unbounded when scene captures render with bDisableWorldRendering=true
UE - Rendering - Features - Oct 20, 2026When UGameViewportClient::bDisableWorldRendering is true and the scene is rendered only through manually triggered scene captures, FDistanceFieldSceneData::PrimitiveModifiedBounds is never reset and ...
Auto Size in Sequencer not working on MovieSceneSkeletalAnimationSection
UE - ACT Character - Sequencer - Oct 20, 2026My understanding of the Auto Size feature on sections in Sequencer is that I should be able to auto size a section based on its contents. For example, if pressing auto size on an animation clip, it ...
WorldSettings of each World Partition cell are replicated in cooked builds
UE - Framework - Networking - Oct 19, 2026In a cooked package build, when the cell package is loaded, AActor::PostInitProperties (Actor.cpp:555) sets RemoteRole = bReplicates ? ROLE_SimulatedProxy : ROLE_None from the CDO default (bReplicat ...