Unreal Engine Issues
Unreal Engine Issues
Enum Compare Condition causes crash when resetting default value of right field in State Tree's Enter Conditions
UE - AI - StateTree - Feb 11, 2026In FStateTreeCompareEnumCondition::GetDescription, the Left.Enum value is mistakingly used when setting the RightValue. This causes crashes when resetting the default value of the Right field in an ...
Landscape Splines in Partially Loaded World Partition Levels Can Cause Nanite Landscape Invalidation
UE - Graphics Tools - Terrain - Nov 7, 2025Certain placements of landscape splines in world partition levels can cause Nanite landscape proxies to invalidate, and switch back to their non-nanite version. This happens when specific regions of ...
ChaosWheeledVehicleMovementComponent is breaking the const CDO contract and changes to the instances are being applied to the CDO
UE - Runtime - Character - Apr 28, 2025As described by the licensee, the const CDO contract is being broken on ChaosWheeledVehicleMovementComponent. The issue the licensee is facing is that by spawning cars with different configurations, ...
Reference to control rig can be lost on actors with multiple skeletal mesh components
zComponent - Archive - Apr 4, 2023In the attached project, when we initially add a control rig track for the actor with multiple skeletal mesh components, we add the control rig for the correct component because FControlRigParameter ...
Material LocalPosition node does not work correctly with Nanite Skinned meshes
UE - Rendering - Graphics Features - Dec 1, 2025Nanite Skinned Meshes don't receive the correct Local Position in some shadow passes. This depends on the clipmap level, and is not related to VSM caching. Unreal Engine 5.6 shows the same issue, b ...
InstancedStruct Local Variables do not work
UE - Core - Systems - May 7, 2025The licensee has noticed that local variables of type InstancedStruct return nullptr. The setup is a verification of the behavior. Class variables work normally. I've tested this behavior on every v ...
Error using Panoramic Capture Plugin with an absolute path
UE - Media Framework - Nov 17, 2023When using the Panoramic Capture Plugin to render 360-degree images, it is possible to specify the output directory of the generated files. This can be any absolute path, or any relative path starti ...
Compiling on Mac fails if build path has spaces
UE - Platform - Apple - Jan 6, 2015UPDATE: We were able to get around this issue by renaming our external drives. The actual problem is that Mono's xbuild fails to build UnrealBuildTool QA REGRESSION: YesWORKING: 2386770BROKEN: 23 ...
Regression: Selected Virtual Production Roles are saved but not loaded from Saved/Config/WindowsEditor/UserVPRoles.ini, unless file DefaultUserVPRoles.ini exists (even if completely empty)
zComponent - Archive - Mar 7, 2025When the "Virtual Production Utilities" plugin is enabled, the Editor makes available a list of "Virtual Production Roles", which can be created and individually selected in a "VP Roles" dropdown on ...
Skeletal mesh LODs never stream up under SSAM: FSkeletalMeshSceneProxy caches ForceStreamedLOD and is never re-gathered
UE - World Creation - Worldbuilding Tools - Jul 29, 2026UE 5.8, cooked build, SSAM enabled (s.StreamableAssets.UseSimpleStreamableAssetManager=1, required by FastGeo). Symptom: characters spawn at a crude LOD and can never stream up for the lifetime of ...