Changing "Coordinate Light Map Index" When "Generate Lightmap UVs" Is Enabled In A Static Mesh Crashes Engine

Tools - Dec 31, 2019

When altering "Coordinate Light Map Index" in a static mesh when "Generate Lightmap UVs" is enabled in LOD 0 the engine will crash or "Coordinate Light Map Index" will be set to 0. A demonstration ...

[CrashReport] UE4Editor_Foliage!operator<<() [foliageinstancebase.cpp:93]

UE - World Creation - Worldbuilding Tools - Foliage - Jul 5, 2016

This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Fatal error: [Link Removed] [Line: ...

ChaosDestructionDemo packages cannot be created in 4.25.1

UE - Simulation - Physics - Jul 17, 2020

Editor crash when the renderdoc.captureframecount is set more than 1

UE - Rendering Architecture - RHI - Jun 27, 2023

Importing FBX file with same material slots and texture names has bugs

UE - Editor - Content Pipeline - Import and Export - Jul 31, 2020

When importing a file from Blender, UE creates the correct number of materials, but the number of textures is incorrect and is being overwritten, and not importing the correct amount. Tested and re ...

Crash when exporting static mesh actor to FBX (Array index out of bounds)

UE - Editor - Content Pipeline - FBX - Apr 25, 2025

I set the Forced LOD Model on the mesh component > 1, then tried to export, this is what causes the crash. Here is my suggested fix, we just don't use Git or I'd do a PR: In the else() branch of FF ...

Compilation error when using Particle SubUV in Niagara Mesh Particles with Raytracing enabled.

UE - Niagara - Oct 12, 2021

The licensee has shared the following workaround for modifying NiagaraMeshVertexFactory.ush. struct FVertexFactoryInterpolantsVSToPS { TANGENTTOWORLD_INTERPOLATOR_BLOCK #if USE_PARTICLE_SUBU ...

Sequence node numbering error when adding execution pin.

UE - Gameplay - Blueprint - Dec 26, 2018

When using the "Insert execution pin after" option with a sequence node "Then 0" gets removed. ...

Depth buffer collision kills all particles after 1 second

UE - Niagara - May 12, 2020

Somehow the namespace broke between the collision and the trace modules. [Image Removed] [Image Removed] ...

Split Struct Pin on a Function output will return a compiler error

UE - Gameplay - Blueprint - Jan 13, 2015

Split Struct Pin on a Function output will return a compiler error: Error Pin New Param 1 X named NewParam1_X doesn't match any parameters of function NewFunction_0 Error Pin New Param 1 Z name ...