Unreal Engine Issues
Unreal Engine Issues
EngineTest.uproject requires OnlineSubsystemMCP
Tools - May 13, 2017Licensees are unable to run GenerateProjectFiles.bat from a perforce pull due to a non-optional OSSMcp dependency ...
Emissive for Static Lighting - dark spot directly under light
UE - Graphics Features - Jun 27, 2018https://forums.unrealengine.com/development-discussion/rendering/1493948-emissive-for-static-lighting-glitch ...
iOS build from Windows fails if your remote Mac shell is set to /bin/zsh
UE - Platform - Mobile - Jan 19, 2021https://forums.unrealengine.com/development-discussion/ios-development/1696189-ios-launching-error ...
C4D import, missing materials
UE - Editor - Content Pipeline - Datasmith - Importer - Jan 21, 2022cf. https://forums.unrealengine.com/t/texture-problem-with-c4d-import-datasmith/272840 ...
STAT_VolumetricLightmapBuildData is not counted correctly
UE - Graphics Features - Dec 9, 2022STAT_VolumetricLightmapBuildData isn't counted correctly. It seems that the root cause is Volume.IndirectionTexture.DataSize is set to 0 before STAT_VolumetricLightmapBuildData is decreased.// Prec ...
Lighting Scenarios Map Check warning about multiple skylights not supported
UE - Graphics Features - Dec 5, 2016When using Lighting Scenarios and placing a skylight in the lighting scenario levels when you build lighting there will be a map check warning that "Multiple sky lights are active, only one can be e ...
~FStaticMesh() can crash with race condition
UE - Graphics Features - Mar 21, 2017UDN user reported frequent crashes in FStaticMesh::~FStaticMesh() on DrawListLinks[i]->Remove(false); Crash went away after adding critical sections to FStaticMesh::LinkDrawList(), FStaticMesh::Unl ...
Bright Flickering or Black Squares with Rectangle Lights Intersecting Meshes
UE - Graphics Features - May 31, 2024Rect Lights that intersect geometry can produce NaN pixels in SceneColor, which will affect bloom, FXAA, and other future passes. This can lead to large visible artifacts. The NaN values are produc ...
Specular/Anisotropy problems with Nanite Meshes
UE - Rendering - Architecture - Jan 11, 2024Specular highlights can disappear with clearcoat materials, when "Clear Coat Enable Second Normal" is enabled ("r.ClearCoatNormal"). ...
Button remains in hovered state on mobile device
UE - Editor - UI Systems - Jul 11, 2016If the user touches the screen of a mobile device and then drags their finger over a button the button will remain highlighted as though it were being hovered. Note: This was tested on the Samsung ...