Unreal Engine Issues

Geometry collection : Should allow newly broken pieces to go through their own collision detection and constraint solve before the next iteration

Mutable: Child parameters hidden when intermediate Object Group uses "All Options"

FCustomizableInstanceDetails::FillChildrenMap() unconditionally registers parent-child relationships via __ParentParamName metadata without verifying the parent exists in the active parameter list. ...

Mesh Reshape node with modified geometry from another skeleton explodes mesh.

Using the mesh reshape node with seperate meshes produces a broken mesh. An example project: Most if not all clothes will be originally made to fit the Average Male body. I'm trying to morph a tu ...

Control Rig + Animation in Sequencer Can Lead to Unexpected Slider Reset

When a character has both a Control Rig track and an Animation track, interacting with any slider in Sequencer can be interrupted. ...

CSM Cached Shadows missing when changing FOV

When changing the camera FOV with r.Shadows.CSMCaching enabled, the cached shadows don't appear to be used and shadows are missing. This occurs because the r.Shadow.RadiusThreshold can be low enoug ...

Hair Shadows Not Affecting SSS Back Scattering (Subsurface Profile)

Groom strands do not appear to correctly block transmitted light for Subsurface Scattering Profile Materials. In some cases, not only will they not block the light, but can instead lead to more ligh ...

Issue with r.SkyAtmosphere.TransmittanceLUT.UseSmallFormat

When "r.SkyAtmosphere.TransmittanceLUT.UseSmallFormat=1", some values for the Sky Atmosphere at some directional light angles can lead to the sun disk being cut off, and taking on a chord shape. A ...

Downloaded Megascans assets cannot be accessed while offline

Reported in SF [Link Removed] When launching and using Twinmotion 2025.2 or 2026.1 offline, the Megascans library becomes unusable due to the subfolders of the 3D assets, 3D plants, Surfaces and De ...

FarShadow range not considered in GetViewDependentWholeSceneProjectedShadowInitializer

Cascade index 0 is passed into GetViewDependentWholeSceneProjectedShadowInitializer. I think the intent of MaxShadowCascades = 1 and requesting cascade index 0 is to get a single bounding volume for ...

Incorrect CRC hash for shared fragments with FInstancedStruct member

User has encountered an issue with shared fragments that contain a member variable of type FInstancedStruct. It appears that UE::StructUtils::GetStructInstanceCrc32() does not correctly compute the ...