Meshs in a hidden sublevel may generate incorrect navmesh

Gameplay - AI - Nov 6, 2020

If the level has hidden sublevels, the regenerated navmesh result appears to have a hidden sublevel mesh placed at the origin. Apparently, the reason is that bNavigationRelevant is no longer consid ...

Back-face culling not working when translucency is set to Ray Tracing

Rendering - Ray Tracing - Oct 23, 2020

While enabling Ray Tracing from the start of the project, when user sets GlobalPostProcess Translucency to Ray Tracing, the back-face of the plane is not culled. However, when the translucency is se ...

Lighting channels not working as expected when enabling Ray Tracing Shadow

Rendering - Ray Tracing - Oct 13, 2020

Non-Ray Tracing Shadows are only cast from lights on meshes assigned to the same Lighting Channel. When enabling Ray Tracing Shadows this is not the case. Lights will still cast Ray Tracing Shadows ...

Crash when opening OculusVRDartsGame without oculus software installed

Online - OSS - Oculus - Oct 6, 2020

Several users have reported crashes when attempting to open the OculusVRDarts game we offer in our [Link Removed] Instead of allowing the engine to crash, we should handle this issue gracefully and ...

"Out of video memory" crash when attempting to save many assets with source control enabled

Rendering - Sep 25, 2020

This will only repro when connected to source control ...

UDN: Scale keys on additive anims not playing

Anim - Rigging - Sep 10, 2020

https://udn.unrealengine.com/questions/600810/index.html Scale keys on additive anims behaves differently than other transform components. ...

Persistent note on custom event when param is created from connecting array - "No value will be returned by reference"

Gameplay - Blueprint Compiler - Sep 10, 2020

If the user creates an array parameter on a custom event node by connecting a pin to it, a persistent node will appear on the node that cannot be cleared. This only occurs if the param is created b ...

Multiplayer Preview in VR HMD input routed to all players

XR - Sep 1, 2020

Multiplayer Preview in VR is not useful because HMD input is routed to all players. ...

Tile Streamed in Temporarily has Stepping on Landscape

Tools - Landscape - Aug 28, 2020

This was reported in a UDN. Jeremy M. originally pointed out that the stepping looks to be caused by high res geometry sampling a low res heightmap. Additional observations:Loading the tile in w ...

Parameterized Vector4 is treated as Float3

Rendering - Aug 28, 2020

A Parameterized Vector4 are being treated as Float3. This prevents users from being able to use Vector4s in an If node during runtime. This is seen as far back as //UE4/Release4.22 cl 8065155 so th ...