Unreal Engine Issues

Lighting behavior is unreliable for translucent lit materials, results are inconsistent depending on the editor camera's FOV and the editor viewport's width/height/aspect

When working on the level editor viewport or testing on PIE, the visual appearance of additive/translucent lit materials changes significantly (and abruptly) when varying the camera FOV or the viewp ...

Crash when removing and re-adding instances to an InstancedStaticMeshComponent with PerInstanceCustomData.

When using an InstancedStaticMeshComponent with PerInstanceCustomData, the number of float elements in the "Custom Data" array should always be equal to NumCustomDataFloats multiplied by the number ...

Packaged ThirdPerson template with "start in vr" enabled packaged and launched with "-nohmd" crashes

The callstack is not XR-specific, it's just the engine trying to secure the audio device on startup, windows failing to return one, and the app not being able to continue safely. The crash does not ...

Editor crash when calling function that contains a local Map varaible

When a function contains a local map variable, calling the function causes the editor to crash. This only occurs is the map is defined at the function level, no crash occurs if the map is declared ...

Decals custom depth/stencil side effect from Lumen

The order of passes related to Decal rendering (without the DBuffer) and CustomDepth is changed by the CVar "r.Lumen.AsyncCompute", even when Lumen is not enabled. This causes Decal Materials that ...

Intermittent fatal assert in GetArchetypeFromRequiredInfoImpl for an object with RF_NeedLoad

The archetype instance for the ProceduralMeshComponent's physics data object is not flagged as such, so the event-driven loader does not designate it as a preload dependency, which may be putting us ...

Unable To Add More Than One Element To Default Values For Maps In Blueprint

When adding new elements to a Map in blueprints it will return the error "Cannot add a new key to the map while a key with the default value exists". This is because it currently won't increment the ...

Crash in scene capture UI

https://udn.unrealengine.com/questions/491296/view.html ...

DOF use Descending-Ring-Bucketing algorithm on foreground

UDN: Scale keys on additive anims not playing

Scale keys on additive anims behaves differently than other transform components. ...