Unreal Engine Issues

Cook errors from Landmass plugin in 5.4

Crash on Linux and Windows with Vulkan when adding Atmospheric Fog to a Level

Adding an instance of Atmospheric Fog to a Level causes the Editor to crash on both Linux and Windows when using Vulkan. There is a different callstack when SteamVR is enabled on Linux which is also ...

Engine Crashes When Building Lighting if Precomputed Visibility Aggressiveness is set to VIS Max

The engine crashes when building lighting if World Settings >> Precomputed Visibility >> Visibility Aggressiveness is set to "VIS Max." A Fatal Error message sometimes appears (screen shot attached) ...

Reimport factory not being called for import enabled by plugin

A user reported a problem that started occurring with 4.10 and didn't occur in 4.9.2 (Was unable to get a project in 4.9.2 and thus unable to confirm his claims, therefore I'm not marking this as a ...

Copying a copied 5.0 project into 5.1 does not rename project folder as expected

I was able to reproduce this issue 4/4 times, and initially started in version 4.26 to determine if this issue was a regression or not. When copying a 4.27 copied project into 5.0 or 5.1, the 4.27 w ...

Increase in Engine Stats for large amounts of Hierarchical Instanced Static Mesh Components

Increase in Engine Stats for large amounts of Hierarchical Instanced Static Mesh Components User Description: We are having performance drops of almost 5ms in 4.15 when using "Hierarchical Instanc ...

Unreal crashes when you connect scalar node to scalar input, when material function has a vertex interpolator

There is an issue occurring where Unreal crashes when you connect a scalar node to scalar input when the material function has a vertex interpolator. This issue causes the engine to crash, but the i ...

CameraVectorWS Input Data as Post Process Blendable not Rendering Correctly

When calling a post process blendable to the screen using the CameraVectorWS input data, only the geometry is effected and not the screen space. Note I sent an email out about this issue, and it ha ...

World Outliner selection does not update transform widget location during play

World Outliner selection does not update transform widget location during play. This issue can be easily fixed simply by reselecting the object, this issue only affects the first time the object is ...

Start ARCore Session - Session config fails

ARCore Regression Not seen when updating 4.23 project to 4.24 This did NOT reproduce when updating 4.24 project (Created with Preview 4) to 4.25 MAIN 10406617 ...