Unreal Engine Issues

Focus tracking calculations for cinecamera lose precision when panning camera (moving tracking subject to edges of frame)

Focus tracking calculation is off for keeping focus sharp on tracked object when object moves away from center of camera lens ...

Can't set User Param Binding to override mesh in a Niagara Mesh Renderer

The User Param Binding seems to be typed as UStaticMesh, which does not allow fort UObject or UNiagaraDataInterfaceStaticMesh types to be added to its drop-down, so no user parameters can be selecte ...

"Pass-By-Reference" inputs to a multicast RPC can crash

Passing a parameter by reference for an RPC does not seem to be a supported operation, and UnrealHeaderTool will already throw an error if a networked UFUNCTION includes any OutParms. However, users ...

Decal of Emissive is not displayed on thumbnail.

Jittering appears when setting DOF in ES3.1

For reference, it was fine in 4.24 In particular, jittering is severe when the camera is moving. GaussianHalfRes has been removed in CL 14036168, which is likely to cause degradation issues if int ...

Fbx Importer: Make sure the blendshape curve keys have the correct tangent scale

The tangent of the blendshape curve seam to have the wrong scale (but correct direction) from this UDN. https://udn.unrealengine.com/s/question/0D54z000079J03OCAS/skip-compressing-anims-and-buildin ...

Bool input pins connected to boolean logic nodes can fail to compile

Bool input pins will fail to compile when connected to a boolean logic node and the node also has a float input pin that is currently connected. Compilation will fail with the error Default value ' ...

AbsoluteWorldPosition and PDO not working correctly in SingleLayerWater calculations

The licensee has provided a recommended fix for this issue. Please see the UDN.  ...

There's no motion blur on streaming GeometryCache

UDN customer mentioned: "there looks to be support for motion vectors as exported from DCC apps (for rare cases like fluid sim), but regular in-engine motion vector calculation for regular motion bl ...

Groom + RT refraction not working correctly