Unreal Engine Issues

In -game in Editor, if streaming-in a LevelInstance and initialize its world partition, then leaving that cell and make it go outside the streaming grid, to re-enter it again, will trigger a check(!StreamingPolicy) if no GC has happened during that time.

This crash can be fixed by adding a couple of || IsRunningGame() like it is done here:    FGenerateStreamingContext Context = FGenerateStreamingContext()        .SetLevelPackagesToGenerate((bIsPIE ...

PropertySet : changes in instancedstruct are not detected by the watch

Hi, I tried to use for a scriptable tool the watch property node for a struct. The objective for me was to offer to my user a view of a struct in the scriptable tool and have these modifications b ...

Disabling bLerpUVs in Nanite Settings of Static Mesh causes texture warping in clusters

The licensee has identified a potential fix by changing if( Settings.bLerpUVs ) to if( Settings.bLerpUVs || UVIndex == 0 ) On line 389 of NaniteBuilder\Private\Cluster.cpp in UE 5.5 ...

A Skeletal Mesh simulating physics that hits a Geometry Collection Actor with OneWayInteraction true, OneWayInteractionLevel 1, and is using Damage Propagation (default) will be accelerated so fast it immediately disappears by hitting the world limits

A Skeletal Mesh simulating physics that hits a Geometry Collection Actor with OneWayInteraction true, OneWayInteractionLevel 1, and is using Damage Propagation (default) will be accelerated so fast ...

[Legacy][FBX] Animation curves are not added to the skeleton anymore

[UDN - 16673100] Calling FComponentVisualizer::NotifyPropertyModified() on a FInstancedStruct property loses all data inside because the PreviewActor spawns with default properties in the FInstancedStruct

We found a problem with the component visualizer system and the PreviewActor in the Blueprint editor. If your component is using a FInstancedStruct in anyway, either directly, in a TMap, or TArray, ...

Normals and tangents do not get normalized when recompute is on during static mesh to skeletal mesh conversion.

When doing a static mesh to skeletal mesh conversion where the source object is an OBJ, if recompute normals or tangents is on, then the resulting normals and tangents will be broken. ...

Water body actor casts static shadow

WaterBody Actors will cast static shadows in built lighting even if their Cast Shadow options are disabled. ...

Undoing Replace Actor on Level Instances do not reload the Level Instance

Undoing Replace Actor on a Level Instance does not properly reload the previous Level Instance. ...

Params in material instance disappear when grouping is changed in material with a material layer

If there is a texture parameter within a specific material attribute stream in the base material and also within the base material layer, they must have the same parameter group otherwise the parame ...