Unreal Engine Issues

Unable to Import Alembic Files in UE4

We have written a plugin for UE4 that allows Unreal users to import and set up Megascans assets into Unreal Engine. Recently we added Alembic files to our assets and also updated all our plugins to ...

Crash/ensure when linking anim layers from animation update

Originally reported here: https://udn.unrealengine.com/questions/562047/linked-layer-animation-blueprint-proxy-missing-ske.html When linking an anim layer during update, we get either an ensure or ...

Crash if the setting of PhysicalAnimationComponent is changed in the same frame as teleport processing

Crash when ApplyPhysicalAnimationProfileBelow node and UPhysicalAnimationComponent :: UpdateTargetActors by UPhysicalAnimationComponent :: OnTeleport run in the same frame. Because RuntimeInstanceDa ...

SceneQuery: UWorld::SweepSingleByChannel doesn't return BoneName on skeletal meshes with per-poly collision enabled

Scene queries when encountering skeletal meshes with per-poly collision enabled do not return a bone name in the HitResult. Returning the BoneName always or having it as an option via FCollisionQuer ...

Screenspace Denoiser creates artifacts for Ray Traced Shadows

Screen space denoiser creates two types of artifacts: artifacts around boundary for general lighting The artifact is there before 5.2 but since the ray traced shadow denoiser denoises on the sqr() s ...

pose search cook determinism issue

Planar Reflections distorted if Separate Translucency Screen Percentage less than 100%

Planar reflections with any value lower than 100 for SeparateTranslucencyScreenPercentage are skewed/distorted when moving the camera, not representing the correct image when the value is 100. ...

High Res Screenshot Tool Scene Color rendering washed out as EXR

When rendering out the Buffer Visualization Targets with the HDR setting on, the resulting Scene Color EXR is rendering significantly washed out compared to the Buffer Viz. in the Editor and if comp ...

Actors with Net Load On Client disabled still appear on Clients when Use Single Process is disabled

Actors with Net Load On Client disabled still appear on Clients when Use Single Process is disabled. Does NOT occur in packaged projects. Test project included. Set Use Single Process to false in E ...

Color Picker window closes when selecting objects in the viewport with the Eye Dropper Tool

The color picker window stays open if the Eye Dropper tool selects color from anywhere other than the viewport. The color is captured in the color picker before it closes, but makes it a nightmare t ...