Poses Asset UI doesn't update correctly when updating from new source animation

OLD - Anim - Jul 11, 2016

If the user updates to a new Source Animation for a pose asset, while a pose was active in the viewport (weight set to 1.0), the pose will be set to 0.0 in the pose list even though it's still activ ...

Physics Constraint Actor Won't Disable Collision Between Two Actors That Are Already Colliding

UE - Simulation - Physics - Feb 17, 2020

Meshes that are colliding that are set as constraint actors don't follow the Physics Constraint Actors "Disable Collision" parameter if they are colliding prior to being set as constrained actors. ...

Unnecessary reference remains in material instance when using StaticSwitch in material

UE - Graphics Features - Aug 7, 2019

1.Create a material that switches textures using StaticSwitch. 2.Create a material instance and toggle the switch to overwrite the texture. 3.Then return the static switch settings to their defaul ...

ImageSize in Image widget is not set when setting a texture as a brush

UE - Editor - UI Systems - UMG - Aug 1, 2023

Since FDeprecateSlateVector2D has been implemented in 5.2, the following function calls will always fail. Therefore, the ImageSize is not updated. This problem does not occur in 5.1.   void SBrus ...

IsSpatiallyLoaded = false set in actor blueprint is not respected in standalone game

UE - World Creation - Worldbuilding Tools - World Partition - Jul 1, 2024

In past compatibility detection in FWorldPartitionClassDescRegistry::PrefetchClassDescs, as AssetRegistry.TryGetAssetPackageData returns UE::AssetRegistry::EExists::Unknown in standalone games, so t ...

Directional light triggers 'too many overlapping lights' error in forward shading

UE - Graphics Features - Sep 24, 2019

The underlying reason seems to be that the stationary lights require SM channels for casting shadows  from movable objects and they are assigned channels 0,1,2 by lightmass (or somewhere along the w ...

Rect lights cause visual noise on the light rendered when using raytracing

UE - Graphics Features - Lumen - Nov 12, 2019

Rect lights cause visual noise on the light rendered when using raytracing. It is easier to see when you get rid of all other light sources in the scene. I have attached an example project. This se ...

When move selected foliage to level, Foliage can not move to level.

UE - World Creation - Worldbuilding Tools - Foliage - Jul 18, 2017

With 4.15, I can move Foliage to "Sublevel B", but I can not move it with 4.16. It seems to be affected by the update in 4.16 (New: When moving a foliage asset to a new level, you will now be prompt ...

On mobile devices, Audio that is trigger with a TriggerBox are playing from the beginning of the Audio Clip and not from the selected time

UE - Platform - Mobile - Jan 13, 2015

If you have a trigger box trigger an ambient audio clip when you enter the box, the audio clip will always play from the beginning even if you have the Start time starting later in the audio clip. ...

The option to add a component to an Actor Blueprint from inside a child Actor Component BP isn't available

UE - Gameplay - Dec 16, 2015

The option to add a component to an Actor Blueprint from inside a child Actor Component BP isn't available. Using Get Owner inside the Actor Component's Event Graph and then casting to the owning Ac ...