Unreal Engine Issues
Unreal Engine Issues
Datasmith & mikktspace tangent cause entities to glow with lightmaps
UE - Editor - Content Pipeline - Datasmith - Exporters - Feb 22, 2019The steps above are reduced to their simplest expression. I appears that several customers complained about lightmap baking resulting in glowing objects. This typically happens on interior door fr ...
Using Snap Rotation displays the Rotation wrong (or calculates the Rotation wrong and losses precision) when the Y rotation axis is 90 degrees
UE - LD & Modeling - Modeling Tools - BSP - Nov 7, 2019Although the Details Panel shows the degrees wrong, the object seems to have done it's rotation correctly but not in the right degrees. It will rotate to the position specified but it goes the wrong ...
Preview Scene - Lighting Rig Rotation rotates Environment Map and Directional Light in opposite directions
UE - Graphics Features - Aug 25, 2020When previewing an object, manually changing the rotation using the Lighting Rig Rotation rotates Environment Map and Directional Light in opposite directions. This bug makes it difficult to do look ...
UPoseAsset::SetBasePoseName() always sets INDEX_NONE
UE - Anim - Runtime - Apr 11, 2025UPoseAsset::SetBasePoseName() does not correctly set the BasePoseIndex when a valid pose name is provided. Regardless of input, the pose defaults back to ReferencePose. Upon inspection of the implem ...
StreamableManager does not apply CoreRedirects to loaded paths
UE - Framework - Jun 12, 2025When loading soft object paths directly, it applies any important CoreRedirects by calling the function FixupCoreRedirects if the initial load attempt fails. In the repro steps, this will apply this ...
WorldCoordinate3Way produces Incorrect Axis Lerps
UE - Graphics Features - May 18, 2016The Material Function WorldCoordinate3Way seems to incorrectly perform the Lerps from the axis contributions of the normals. An example is show here, with the left objects using the version that com ...
Granular Synth stays silent since it cannot load the sound with Stream Caching enabled
UE - Audio - Jun 1, 2020Using Granular Synth with Stream Cache enabled, Granular Synth will stay silent since it cannot load the sound with Stream Caching turned on. This was reported and tested in 4.25 (CL-13144385). Thi ...
Playing audio files in Editor doesn't work when Magic Leap Zero Iteration is enabled
UE - Platform - XR - Jun 14, 2020When the "Enable Zero Iteration" and "Use ML Audio for Zero Iteration" settings are both checked, the audio doesn't play inside Unreal Editor. This happens in the following cases:Playing an audio fi ...
Misaligned sampling in UI Material with with CustomStencil
UE - Editor - UI Systems - May 19, 2025The output of the CustomStencil node in a User Interface material does not align with the viewport dimensions. Toggling fullscreen/windowed mode (F11) causes the offset to reappear, so scaling the n ...
Spring Controller node rotation not working
OLD - Anim - Jan 31, 2019The issue has been reported by one of our licensee. He proposed a patch to be applied in AnimNode_SpringBone.cpp 188,189c188,191 ＜ FVector ParentToTarget = (TargetPos - ParentSpaceBase.GetLoca ...