Phat Mirroring does not work correctly

Physics - Apr 25, 2019

There are various issues with mirroring in phat. Some issues are:Incorrect transforms(translation rotation and scaling) for both constraints and bodiesModifying un-selected constraints' angular lim ...

FSoftObjectPath properties marked as both Config and Untracked are being tracked

Core - Apr 25, 2019

A licensee has found that marking an FSoftObjectPath property as Config and Untracked causes the untracking metadata to be ignored. This is because FSoftObjectPathThreadContext::GetSerializationOpt ...

HISM Rotated Instance is Culled Whenever its Pivot Moves Out of Camera View

Rendering - Apr 23, 2019

HISM rotated instance is culled whenever its pivot moves out of camera view.  Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5660361, 4.23 CL# 6037269 ...

Changing the Curve Asset in a Material Instance That Uses a Material Layer Crashes the Editor

Rendering - Apr 22, 2019

Changing the Curve Asset in a Material Instance That Uses a Material Layer Crashes the Editor. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5660361, 4.23 CL# 5974510 ...

CachedLocalBounds is incorrectly updated

Anim - Apr 19, 2019

USkeletalMeshComponent::CalcBounds updates CachedLocalBounds by transforming the world FBoxSphereBounds, by the WorldToLocal transform, which is not sufficient to calculate the bounds in local space ...

Foliage and Static Mesh Actor Distance Field Shadows Incorrect after Manually Shifting World Origin to New Location

Tools - Foliage - Apr 19, 2019

Foliage and static mesh actor distance field shadows incorrect after manually shifting world origin to new location. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5660361, 4.23 CL# 5974510 ...

Missing warning when dynamically simulating actor without physics enabled

Physics - Apr 18, 2019

Warnings are logged when a body without physics collision enabled is set to simulate via the editor, but not when set programmatically during play. ...

Planar Reflections Falling Back to Baked Probes at Certain Angles

Rendering - Features Teams - Apr 18, 2019

Planar Reflections Falling Back to Baked Probes at Certain Angles. Found in 4.21 CL# 4753647,  4.22 CL# 5660361, 4.23 CL# 5974510 Working as expected in 4.20 CL# 4369336 This is a regression ...

Physics/Animation blending does not update collision

Physics - Apr 16, 2019

Setting bodies physics blend weight, blends an animation with physics simulation but does not update the collision bodies to match as is expected, instead the collision bodies are at their fully sim ...

Niagara Ribbons using Two Sided materials are incorrectly lit

Rendering - Niagara - Apr 15, 2019

Two Sided materials are lit incorrectly on Niagara ribbons. The sides will be flipped of how they should be. ...