Landscape corruption in editor

UE - LD & Modeling - Terrain - Landscape - Apr 10, 2015

Two licensees are reporting visible landscape corruption when opening their level in the editor, which goes away after various actions - opening the landscape editor or building geometry. PIE / game ...

Lightmap Coordinate Index is not automatically set to 1 on import any longer with lightmap UV

UE - Editor - Content Pipeline - Import and Export - Sep 6, 2016

When importing a static mesh with a second UV channel setup for the lightmap the second UV is no longer being automatically assigned as the lightmap coordinate index. In 4.12 the second UV detected ...

Advanced Vechicle Template throws warning about no default skeleton when opening the physics asset

Docs - Samples - Dec 3, 2014

DESCRIPTION: If you try to open the physics asset for the Advanced Vehicle template will throw a warning that the physics asset has no default skeleton and that it will be replaced with the default ...

Crash Occurs When Importing a .ABC File as Skeletal Mesh Into Project That Already Contains Asset's Materials

OLD - Anim - Jun 8, 2018

Editor crashes when importing an .abc file as a skeletal mesh and the assets materials already exist inside the project. -Materials need exist inside project before import -If the .abc file is imp ...

[Feature Request] Search folders and apply existing materials on mesh import

Tools - Nov 24, 2016

User request: When importing a mesh from FBX with named materials assigned, search folders for existing identically named materials and automatically assign those to the mesh. I thought that this ...

Wrong normal map compression settings when importing USD file

UE - Editor - Content Pipeline - USD - Apr 22, 2022

Customer Comments: this is just a workflow issue where you need to set the compression settings to normal or tick the sRGB checkbox to fix the shading issue Regression testing done in //UE4/Rele ...

Import then cancel while file is read leads to potential crash

TM - Interoperability - Oct 6, 2025

1/ Import a file with mootools such as an fbx 2/ while the file is still read, cancel the import Result : may crash few times after (when theoretically the file has finished being read) - not repr ...

On static mesh import correctly named materials in project aren't automatically applied

UE - Editor - Content Pipeline - Import and Export - Jul 16, 2019

When importing a static mesh into a project with the appropriately named materials in it already they won't apply to the mesh automatically when setting Search Location to All Assets without being i ...

[Waveform Editor] - Changing the Edit time on a Sound Wave that has TotalSamples=0.0 can crash editor

UE - Audio - WaveformEditor Plugin - Nov 10, 2022

Rapidly changing the End Time on an asset that has TotalSamples=0.0 in the WaveFormEditor cases the editor to crash. Work around is to reimport the asset, which will restore that value. The crash hi ...

Datasmith & mikktspace tangent cause entities to glow with lightmaps

UE - Editor - Content Pipeline - Datasmith - Exporters - Feb 22, 2019

The steps above are reduced to their simplest expression.  I appears that several customers complained about lightmap baking resulting in glowing objects.  This typically happens on interior door fr ...