Unreal Engine Issues
Unreal Engine Issues
Map load stalls in texture streaming code
UE - Graphics Features - Jun 13, 2017A change was made to AActor.GetComponents which appends the results instead of resetting the output array. This seems to only impact 2 places in the code, and has a big side effect in the texture st ...
Unimplemented Simplygon function causes empty mesh LODs and crashes
Tools - Aug 31, 2018When we do the refactor for MeshDescription we miss the staticmesh reduction project settings option and change only the quadric reduction. There are two possible fixes for this issue: 1. Implemen ...
Mobile VR - Render Targets not working with Mobile Multi-View
UE - Platform - XR - Jun 6, 2019Render target materials display as black on mobile VR when Mobile Multi-View is enabled. Also confirmed with LDR capture source. User also reports issues with scene depth (potentially fixed with [ ...
Using OnlineSubsystemGoogle cause ITMS-90809 warning when uploading iOS build to AppStoreConnect
UE - Online - Jan 16, 2020Because the OnlineSubsystemGoogle for iOS use old GoogleSigninSDK(Ver4.x), when uploading the iOS build to AppStoreConnect, ITMS-90809 (using a deprecated UIWebView) will be issued. To fix this, we ...
When changing the size of detail panel for animation state in Animation Blueprint diff tool, GetSelectedProfileName will occur crash
OLD - Anim - Jun 24, 2020When trying to display BlendProfile property in Animation Blueprint diff tool, it will occur crash, because EditableSkeleton is null in SBlendProfilePicker::GetSelectedProfileName(). So, a followin ...
Overriding Component class does not work properly in grandchild class BP
UE - Framework - Blueprint - Feb 22, 2023If you set ComponentClass override in child class BP and grandchild class BP respectively, it is ignored in grandchild class. This issue is probably related to [Link Removed] ...
Crash when editing FRuntimeFloatCurve's curve from sequencer's edit key window
UE - Anim - Sequencer - Mar 31, 2023Crash when editing a FRuntimeFloatCurve curve exposed through EventTrack or a self-made Struct from the sequencer key edit window. FRuntimeFloatCurve does not support Expose to Cinematic, so this m ...
Add Substrate Material Support to Lumen Performance Overview
UE - Graphics Features - Substrate - Feb 10, 2025There is a discrepancy when inspecting Substrate materials in the Lumen Performance Overview. Compared to viewing non-Substrate materials the overview show all surfaces in red indicating that Lumen ...
Disabled Skeletal Mesh Sections cause Shadow Ray Tracing Flicker
UE - Rendering - Graphics Features - Ray Tracing - Dec 12, 2025If a skeletal mesh has a section disabled the ray traced shadow will flicker when the camera or itself moves. Previously in 5.6.0 no raytraced shadow would appear if a section was disabled. This wa ...
Cannot move instances of a hierarchical static mesh component in the blueprint editor viewport
UE - Gameplay - Components - Apr 12, 2016Can move individual mesh instances of a regular instanced mesh component in the blueprint editor, but not hierarchical ones. Originally reported as a pull request in [Link Removed], but we rejected ...