Unreal Engine Issues
Unreal Engine Issues
ISM Component in an instanced BP does not take into account changes to NumCustomDataFloats from the BP class
UE - Graphics Features - Sep 16, 2022PerInstanceSMCustomData is bulk serialized and doesn't get changed on the BP instance when changing NumCustomDataFloats, possibly causing out of bounds array access leading to a crash. Possible sol ...
FMaterialResource::IsDualBlendingEnabled bug
UE - Rendering Architecture - Materials - Jul 24, 2023The user has a proposed fix for this in the case. FMaterialResource::IsDualBlendingEnabled needs the following modification that includes MaterialInstance check: bool bMaterialRequestsDualSourceBle ...
Auto Exposure Compensation Curve issue when switching from Histogram to Manual
UE - Rendering Architecture - Feb 21, 2024When switching the Camera's Exposure Metering Mode from Histogram to Manual, there is a single-frame flash. The Licensee has a proposed code change that would fix this issue. Also found in 5.4, CL 3 ...
Performance hitch from RemoveGeometryCache flushing the render thread
UE - Editor - Content Pipeline - Alembic - Jun 12, 2025FGeometryCacheStreamingManager::RemoveGeometryCache calls FlushRenderingCommands which shows up as a hitch when profiling. [Link Removed] Ideally the flush added in CL#23782411 to fix a rare deadl ...
Creating blueprint based on landscape crashes editor
UE - LD & Modeling - Terrain - Landscape - Aug 24, 2016If a blueprint is created from a landscape object, the editor will crash. Frequency: 5/5 ...
Editing InlineEditConditionToggle variable value causes editor to crash
Tools - Oct 7, 2016Editing property with InlineEditConditionToggle meta specifier causes the editor to crash. Workaround: Calling Super::PostEditChangeProperty after property changing code prevents crash from occurri ...
Cancelling level save due to previous save crashes editor
UE - Foundation - Core - Sep 12, 2016If a level has been saved as two different levels and a new save initiated, the editor will crash if the overwrite is cancelled. Frequency 3/3 Regression (Yes) issue (does not) occur in 4.12.5 ...
Editor crashes if a sublevel with a landscape is duplicated then added to the persistent level as a sublevel.
UE - LD & Modeling - Terrain - Landscape - Aug 18, 2016If a sublevel is duplicated and contains a landscape, the editor will crash when the duplicate level is added to the persistent level as a sublevel. Frequency 4/4 Regression (yes) issue (does not ...
FFieldPath resolution doesn't handle redirection
UE - CoreTech - Feb 16, 2022A licensee has found that redirectors don't apply to FFieldPath. We should integrate it with the following changes:It needs better error handling (looks like it could infinitely recurse),The change ...
Attempting to generate abstract class from blueprint crashes editor on compile
UE - Gameplay - Blueprint - Sep 22, 2016Attempting to generate abstract class from blueprint crashes editor on compile. Frequency: 4/4 ...