Unreal Engine Issues
Unreal Engine Issues
Blueprints converted to static mesh with negative scales for a component will invert the faces
Tools - Dec 19, 2016Negative scaled static mesh components in a blueprint will invert their faces when converted to a static mesh. Note that this does not happen in the following situations: If the BP is scaled negat ...
Changing reflection capture resolution after setting preview rendering level to Android ES3.1 crashes the editor
UE - Graphics Features - Nov 20, 2019Applying a new reflection capture resolution after changing Preview Rendering Level to Android ES3.1 results in crash. Tested in: 4.24 P3 CL#10283392 4.25CL#10303496 ...
AnimNotifies get reproduced more times than expected.
UE - Anim - Sep 3, 2024When setting an AnimNotify to an AnimationSequence, this AnimNotify can be triggered multiple times when only set once. This issue only happens when the mentioned AnimationSequence that contains the ...
High Virtual Texture Sample/Lookup Cost when using a Virtual Texture in a Material Layer Blend
UE - Rendering Architecture - Materials - Mar 14, 2025Some Material Attribute blends in Material Layer Blends can cause Virtual Texture samples to be duplicated in HLSL. This can be avoided by sampling the Virtual Texture in the Parent Material, and pa ...
PhysX generates extra "sleep" event when moving Kinematic actors away from Simulated actors with Teleport option.
UE - Simulation - Physics - Aug 4, 2016Issue seems to be related to NpRigidDynamic::setKinematicTarget. When called by itself (like in the case of Kinematic bodies moved without teleportation), the simulated actor is woken and is put ba ...
Cannot save actor after actor component modification, Graph is linked to private object(s) in an external package
UE - Gameplay - Blueprint - Sep 28, 2016Cannot save actor after actor component modification. The user gets the error Graph is linked to private object(s) in an external package ...
Bitfield enums don't cast correctly in Blueprints
UE - Gameplay - Blueprint Compiler - Jan 22, 2025The licensee already investigated this a little. The problem appears to be that UKismetNodeHelperLibrary::GetValidValue should be calling IsValidEnumValueOrBitfield as opposed to IsValidEnumValue. ...
Increment and decrement nodes return the incorrect value
UE - Gameplay - Blueprint - Jun 23, 2015Increment and decrement nodes return the incorrect value User Description: Getting the result of the Increment Macro seems to be incrementing the variable twice. Very confusing. Is this normal? ...
Mobile Preview -> AutoLandscape Material broken if created in 4.22+
UE - Platform - Mobile - Oct 25, 2019Landscape Layers created in 4.22+ revert to default material in Mobile Preview. Confirmed in MAIN at CL 9730599 ...
Forward Rendering causes Volumetric Material to not render against background
UE - Graphics Features - Nov 15, 2022Regression: Tested in UE5/Release-5.0, and the issue is reproduceable. This issue appears to occur when the SkySphere is deleted from the level, as leaving the SkySphere in the level causes the Vol ...