Widget Slider increments in an odd way when it is dragged outside of its bounds when next to another Widget

Tools - UMG - Aug 6, 2020

The attached video shows the results of this bug. When two Widgets are next to each other and one of them has sliders, when the sliders are dragged past their bounds they will increment backward so ...

Groom Assets do not render fog

Rendering - Features Teams - Aug 4, 2020

Grooms are not rending correctly when volume fog is in a scene. ...

Current animation asset is lost in animation preview when a post process anim BP is compiled

Anim - Aug 3, 2020

UDebugSkelMeshComponent and PreviewInstance are lost current animation asset. There are 2 ways to fix below void UDebugSkelMeshComponent::InitAnim(bool bForceReinit) { // If we already have Pre ...

Duplicating a blueprint that implements an interface and then removing that interface will cause compile errors that don't occur if the interface was removed from the original BP

Gameplay - Blueprint Editor - Aug 1, 2020

See steps to reproduce. Looks like the fixup when saying Yes to "Would you like to transfer the interface functions to be part of your blueprint" doesn't work correctly on the duplicated BP. Inter ...

Reimporting sprite sheets does not work correctly if the editor has ever been closed and reopened since initial import

Gameplay - Paper2D - Aug 1, 2020

UPaperSprite::PostLoad() now sets BakedSourceTexture, BakedSourceUV, and BakedSourceDimension (if AtlasGroup is nullptr). There's nothing in reimport that sets them, so they are stale/latch to the ...

USD Stage window doesn't update when selecting other USDStageActors

Tools - Import - Jul 31, 2020

Toggling between USD Stage Actors does not update the USD Stage window with the information from the selected USD Stage. Only the information from the last loaded USD Stage Actor is present. ...

Importing FBX file with same material slots and texture names has bugs

Tools - Import - Jul 31, 2020

When importing a file from Blender, UE creates the correct number of materials, but the number of textures is incorrect and is being overwritten, and not importing the correct amount. Tested and re ...

Lightmaps cannot be created correctly when copying Blueprint that has Static Light as Child Actor component on the level

Rendering - Ray Tracing - Jul 31, 2020

In this project, BP with Spot Light registered as Child Actor is placed. If we copy and build, the following warning will be displayed. BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_330 'BP_Spotlig ...

Fix primitive uniform buffer validation.

Rendering - RHI - Jul 31, 2020

GPUScene primitive validation is currently busted and asserts. It looks like there are two problems: 1) NaN's in the entries can cause comparison issues, so a MemCmp would be better. 2) There's a ...

ChildAnimBP with different skeleton than parent does not show child skeletons anims in AnimGraphOverrides

Anim - Jul 31, 2020

Create a Parent AnimBP, add any animation to it. Then create a childAnimBP from Parent. In ChildAnimBP, go to TargetSkeleton (from class settings) to change a different skeleton. Then go to the Anim ...