Unreal Engine Issues

Syncing a texture from source control while a material editor sampling it is open will crash the editor

Syncing to source control will cause a crash if a texture is synced that is being referenced by an open material editor, even if the texture hasn't been modified. A quick solution may be to close th ...

Vertex Color Information Lost on Editor Restart

This is a regression. In 4.19 and Main (CL 4008322), vertex color information does not save properly and data is lost when editor is reopened. Creating project from scratch instead of copying over f ...

Cannot run any packaged project if "Force all skinned meshes to recompute tangents" has been enabled in an unrelated project

Enabling the "Force all skinned meshes to recompute tangents" sets the value at a Windows user level so that it affects all UE4 projects opened by that user, including unrelated packaged projects. T ...

DFAO does not support World Origin Rebasing

Mobile landscape rendering corrupted in 4.19

Cannot use code class if it is placed in a folder named "Device"

C++ classes that are located within a folder named "Device" cannot be seen or used within the Editor. The classes cannot be found within the Content Browser, and they cannot be used to create Bluepr ...

Sequencer: Shot Comprised of Several Shots Set to "Evaluate Subsequences in Isolation" Timeline Does Not Scrub

When opening NewLevelSequence, opening shot0010_001, changing the playback settings to Evaluate Subsequence in Isolation, switching back to NewLevelSequence, opening shot0020_001, and scrubbing, ani ...

No Dynamic Shadows From Stationary Lights in Forward Shading Without Building Lighting

I've observed this issue in 4.18.3 and 4.19.1. Per Licensee: So we've spotted an issue that I wanted to put on your radar with dynamic shadowed stationary lights + r.ForwardShading=1 What we're s ...

Distance Field Shadows Not Working On Large Objects

UDN Licensee reported this on 4.16, and I can repro in 4.17- 4.19.  Per Licensee: I'm trying to use distance field shadows on very large objects, but it looks like it does not work. Can you sugge ...

MakeNoise detected one every two calls

Licensee is using the Sense Hearing of the AIPerceptionSystem. When using the GamePlay Debugger they notice that one call of MakeNoise out of every two seems ignored by the AIPerception. ...