Unreal Engine Issues
Unreal Engine Issues
Wrong density calculation in UBodySetup::CalculateMass
UE - Runtime - Simulation - Sep 29, 2025Wrong density calculation in UBodySetup::CalculateMass. The licensee has provided the following analysis and suggested fix: In UBodySetup::CalculateMass, the following code is present: // physical ...
Linux crash upon opening maps in Soul: City content pack
UE - Graphics Features - Jan 29, 2018Opening the maps from the Soul: City asset pack on Linux causes a crash. This seems to be rendering related. It was originally reported as a Vulkan specific issue but we've reproduced it without Vul ...
[CrashReport] Assertion failed: Array index out of bounds - GetPhysicsTriMeshData() [modelcomponent.cpp:688]
UE - Simulation - Physics - Oct 30, 2017This is a semi-common crash that has occurred since at least 4.17.1. The callstack is nearly identical to [Link Removed], which was fixed in 4.18.0, however the error message and source context are ...
"Build All Levels" does not re-AddNavigationSystemToWorld
UE - Runtime - Character - Feb 28, 2024The Build All Levels editor action cleans up the world's NavDataSet (UNavigationSystemV1::NavDataSet) as pre-rebuild world cleanup by calling: SetNavigationSystem(nullptr); inside UWorld::Cleanu ...
Crash when changing a Play Node's "Sequence" to a Montage
OLD - Anim - Jan 20, 2016I understand that this is not something you're intended to be able to do (Montages aren't used this way), but we should bar the user from inserting a montage into this variable slot. Crash occurs w ...
Import then cancel while file is read leads to potential crash
TM - Interoperability - Oct 6, 20251/ 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 ...
Distant paint/scatter grass not rendered in PT exports
TM - Rendering - May 5, 2025Reported in SF [Link Removed] In TM 2025.1.1, in PT renders with large amounts of scattered or painted vegetation, distant grass may not appear in exported renders that would previously appear in t ...
[CrashReport] Linux crash - TOpenGLBuffer<FOpenGLBaseVertexBuffer, 34962u, &()
UE - Platform - Linux - Sep 14, 2017This is an infrequent Linux crash that has affected a few users in 4.17.1 Callstack from Log[2017.09.12-17.23.41:651][ 0]LogRHI: OpenGL MajorVersion = 4, MinorVersion = 5, ShaderPlatform = GLSL_43 ...
Quality settings should not affect landscape resolution
UE - LD & Modeling - Terrain - Landscape - Mar 10, 2015Changing the quality settings (or having them change on you automatically in the editor) drops mips on landscape heightmap textures, which isn't desirable as it makes it look like there are collisio ...
Foliage radius does not affect other foliage assets
UE - World Creation - Worldbuilding Tools - Foliage - May 5, 2016Setting the radius on a foliage asset does not prevent other foliage assets from being painted within that radius. Regression (no) issues (does) occur in 4.10.4 ...