SteamVR - WidgetComponent DrawAtDesiredSize lag spike

UE - Platform - XR - Dec 3, 2019

Having an actor with a WidgetComponent + DrawAtDesiredSize will cause a lag spike when size changes in VR. Additionally, If you enter a value other than 100 in SetWorldToMetersScale the 'draw at ...

[Feature Request] SingleWaterLayer Materials don't receive shadows with Baked or Partially Dynamic Lighting

UE - Graphics Features - Dec 2, 2019

Using baked and dynamic lighting produces varying results when implementing SingleWaterLayer Materials. This was reported and tested in 4.24 Preview 4 (CL-10387632) and reproduced in Main 4.25 (CL ...

Undo and ConstructionScript break the AttachChildren array

UE - Gameplay - Components - Nov 14, 2019

Undo fills AttachChildren array with null by the undo serializer. After that, a construction script tries to remove child components from parent component's AttachChildren but it can't find its poi ...

Hide Bone in constructor does not update world instances

UE - Anim - Runtime - Nov 4, 2019

Hiding bones during construction is not properly displayed by level instances placed at editor time. Note that setting 'Update animation in editor' on the mesh and re-running the constructor script ...

Expose light depth and position to Light Functions

UE - Graphics Features - Oct 14, 2019

Users have requested that light depth and light position are made available to Light Function Materials.Light Depth We seem to be calculating the per-pixel distance from the light to the surface in ...

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 ...

HLSL translator yields duplicated texture sampling code

UE - Graphics Features - Aug 27, 2019

Result: Material will generate following HLSL code inside CalcPixelMaterialInputs(), which results in two PS texture lookups. MaterialFloat4 Local0 = ProcessMaterialLinearColorTextureLookup(Textur ...

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 ...

NumNonClothingSections logic is bad

UE - Editor - Content Pipeline - Datasmith - Jul 26, 2019

We use the NumNonClothing section number to iterate in the sections, this is an error if the cloth sections are not at the end of the sections array. See the following picture of a search on NumNonC ...

Blueprints: Dragging variables into Categories with camel case naming adds spaces to the Category name; creating a second category in details view

UE - Gameplay - Blueprint Editor - Jul 18, 2019

In a blueprint: When dragging a variable onto a Category, and the Category name uses CamelCase, the resulting Category name of the variable will have spaces where the original did not.  "TestCategor ...