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 ...

Sub Surface Shading Model has Strange Blotch Color Artifacts when Used with a Ambient Cubemap

UE - Graphics Features - Sep 23, 2019

Sub surface shading model has strange blotch color artifacts when used with ambient cubemap. Since the subsurface profile shading model can't be used with ambient cubemap I wanted to use the regular ...

Choosing Supported Platforms "Desktop (Win+Max+Linux)" Still Warns Against Packaging for those Platforms

Tools - Sep 23, 2019

Only checking the Desktop (Win+Mac+Linux) option in supported platforms for packaging results in warnings. Even though this one option should cover all three desktop platforms it still causes a warn ...

"Weld Simulated Bodies" Collision flips when welding Skeletal mesh to Static Mesh

UE - Simulation - Physics - Sep 20, 2019

Collision flipped when welding a skeletal mesh to a static mesh. Welding Skeletal mesh as parent actor does not cause collision to flip. Showflag.Collision 1 shows correct collision. (However px ...

The Left Mouse Button Pressed event is not firing when Input Mode Game Only is set and Show Mouse Cursor is true

UE - Editor - UI Systems - Slate - Sep 20, 2019

The Left Mouse Button Pressed event is not firing when Input Mode Game Only is set and Show Mouse Cursor is true. Attached is an example project (4.23) that demonstrates the issue. Found in 4.23.0 ...

Pivot Offset for grouped objects resets to another objects offset

Tools - Sep 19, 2019

Grouping objects with individual pivot offsets causes a new offset location to be selected after manipulating the groups rotation or translation.  ...

Client crashes after second seamless travel when a blueprint manually placed in the world spawns a replicated actor

UE - Networking - Sep 19, 2019

When a user loads into a level that spawns replicated actors using manually placed blueprints twice using ServerTravel with Seamless Travel enabled it will crash. It looks like the engine can't find ...

Render Target Is Jittery/Blurry When Used With A Scene Capture Component

UE - Graphics Features - Sep 19, 2019

Render Target is Jittery and Blurry When Used with a Scene Capture Component. Found in 4.23 CL# 8386587, 4.234 CL# 8748719 This is a regression. ...

Material Translator Uniform Folding Is Not Operating Properly

UE - Graphics Features - Sep 19, 2019

Uniform folding is not working with material parameter collections along with one additional unnecessary instruction generated.  Found in 4.22 CL# 7053642, 4.23 CL# 8386587, 4.24 CL# 8748719 ...

Morpher Animation incorrect if Names Overlap on Imported Mesh

UE - Editor - Content Pipeline - Import and Export - Sep 19, 2019

Overlapping names are imported (with extra renaming), however they fail to attach the animation. Found in 4.22 CL# 7053642, 4.23 CL# 8386587, and 4.24 CL# 8748719 ...