Unreal Engine Issues

D3D Crash applying Built Lighting in a level containing Static Foliage

Editor session crashes applying Built Lighting in a level containing Static Foliage. Note: this crash does not occur if the Instanced Foliage Mesh has mobility set to "Movable" within the Foliage D ...

The orientation of the tangent space seems wrong with SkinCache recompute tangent enabled

BoneMap thread safety crash

Crash occurs in FGPUBaseSkinVertexFactory::FShaderDataType::UpdateBoneData() on RenderThread2 at the following line: check(NumBones <= MaxGPUSkinBones); The problem seems to be a race condition ...

Precomputed lighting is not saved when using Save As or Duplicate for levels

Lighting is invalidated with levels that have been duplicated or Saved As. The maps that are created are immediately marked dirty and need to be resaved vs how they were in 4.12.5 where they wouldn' ...

Copying a destructible mesh in the viewport loses reference to assigned mesh in the details panel

BRANCH: MAIN CHANGELIST: 2346079 PLATFORM: Windows DESCRIPTION: When copying a Destructible mesh in the viewport the Destructible Mesh component will not be shown for the copied mesh. The mesh can ...

Morph Targets flicker Randomly in Slave Mesh

When a mesh is slave to a master mesh, its morph targets will flicker when Played in Editor. This does not occure with the same assets in 4.8. This has been reported by at least two different use ...

32bit TGA Texture With Alpha Has Noticeable Artifacts On RGB Channels (DXT5)

When using a 32bit tga with an alpha channel that has hard edges the compression method (DXT5) will create artifacts in the RGB channels that normally aren't there whit DXT1 compression(no alpha). ...

FBatchedElements::Draw - OrthoZoomFactor can be reset to 1.0f if Line.bScreenSpace is ever false

A licensee has reported that the Draw function in BatchedElements.cpp can set the OrthoZoomFactor (not a local variable) to 1.0f if Line.bScreenSpace is ever found to be false. The line this can oc ...

KiteDemo: DestroyActor Warning when Saving - Height_x3_y2_C_1

While testing in KiteDemo - //UE4/Release-4.16 CL 3420042 in Binary – When the editor autosaved I noticed a warning occurred in the output log. – Issue occurs during any Save operation. User can use ...

Sound Wave Actions Menu Closes Automatically When Changed to Columns View

After changing the view to columns (by going through Right click < Create Dialogue < View Options < Columns) the Sound Wave Action menu will close out automatically before any options can be selecte ...