Unreal Engine Issues
Unreal Engine Issues
RecastNavmesh contents are non-deterministic across navmesh builds
UE - Runtime - Character - Mar 2, 2026Per-tile data such as TileIndex and salt are stored non-deterministically. ...
Non-blueprint ed graphs need to clean up their deprecated pins
UE - Gameplay - Blueprint - Aug 3, 2016Old UEdGraphPins are not being removed from non-blueprint assets. ...
Vectorized and Non-Vectorized FTransform Accumulate are inconsistent with Blendweights
UE - Foundation - Core - Jan 11, 2017The vectorized version of FTransform::Accumulate and FTransform::AccumulateWithAdditiveScale3D only blend the rotation, but not the translation or scale. This is divergent behavior from the non-vec ...
Dumping of world partitioned HLOD stats fails in commandlet
UE - World Creation - Worldbuilding Tools - HLOD - Jan 27, 2025Dumping of world partitioned HLOD stats in commandlets no longer works since updating to Unreal 5.5. The cause seems to be that the functionality has been moved from UWorldPartitionHLODRuntimeSubsys ...
UCanvasRenderTarget2D crashes on some video cards if the BGRA format is selected
UE - Graphics Features - Apr 26, 2021The reason for the crash is that the underlying resource uses DXGI_FORMAT_B8G8R8A8_TYPELESS, and UAV support for that format is optional. UCanvasRenderTarget2D sets bCanCreateUAV to true always, wit ...
Objects moved by Matinee that is paused or stopped retain non-zero ComponentVelocity
UE - Gameplay - Player Movement - Apr 28, 2016Jumping off an object moved by a matinee that is stopped during movement will impart a velocity to the character, even though the object appears to be stopped. This is because ComponentVelocity is o ...
Mismatch in Landscape Layer Weights between Nanite and Non-Nanite Landscapes
UE - Rendering - Features - Nanite - Jul 13, 2026Repro project is available in the additional info URL to save repro time. Disabling Nanite on the landscape, or painting on it (which shows the non-Nanite version of the landscape) reverts the issu ...
Non-Struct CDO component properties display incorrectly in the property editor.
UE - Gameplay - Blueprint - Aug 17, 2016UObjectProperty properties within a UActorComponent class aren't exposed for editing in the Details panel when choosing to edit native component defaults in the BP editor. ...
Light does not affect landscape splines in raster pipeline (non-RT)
UE - Graphics Features - Sep 9, 2021Some landscape grass instances floating when generated on AMD cards under OpenGL
UE - Graphics Features - May 15, 2015User is reporting grass at the edge of their landscape being generated floating in the air on a Mac Pro with AMD GPUs. I have been unable to repro this on my Mac Mini with Intel Graphics HD 4000. Q ...