Unreal Engine Issues
Unreal Engine Issues
In UE5.5(final), when adding plugin from an older version of Unreal to a BP project, we are informed that the Engine Modules are out of date, and cannot be compiled while the engine is running. Please build through your IDE.
UE - Foundation - Cpp Tools - Nov 19, 2024In UE5.5(final), when adding plugin from an older version of Unreal to a BP project, we are informed that the "Engine Modules are out of date, and cannot be compiled while the engine is running. Ple ...
Compiling any material in UE 5.5.1 without ShaderCompiler JobCache results in a crash
UE - Rendering Architecture - Shaders - Jan 15, 2025Compiling any material with r.ShaderCompiler.JobCache=0 causes ShaderCompileWorker to crash. Reproduction steps cause a crash during Editor startup, but this bug may affect other scenarios where mat ...
5.5.3 insights crashes when opening .utrace files with "RenderCommands,RDG,RHICommands" channels.
UE - Foundation - Insights - Feb 19, 2025The customer provided reproduction steps and a trace file that crashes Insights. From the customer: manually placing if (!CurrentGraph) Unknown macro: { return; } nullchecks in RenderGraphInsi ...
Shadow Maps performance issue with 5.4 in comparison towards 5.3
UE - Graphics Features - Shadows - Nov 20, 2024Shadow depths performance for non-VSM in certain scenes, notably those with rect lights and meshes that are set to movable, went from ~2ms to ~18ms going from UE 5.3 to UE 5.4. Setting the movable a ...
Custom Nav Area Not Affecting Nav Mesh Until Restart
UE - AI - May 2, 2016When using a Nav Modifier volume with a custom Nav Area class, the Nav Mesh is not being affected until the editor is restarted. Found in 4.11.2 binary. Reproduced in 4.12 Preview 1 binary and Main ...
Geometry Collection (GC) fragments are affecting the Navmesh in wrong positions
UE - Simulation - Physics - Destruction - Dec 6, 2024Geometry Collection (GC) fragments are affecting the Navmesh in wrong positions and the identified cause is wrong indexing. Once a GC breaks, it's fragments, when big enough, are creating islands in ...
Legacy HLOD Nanite Meshes Always Rendering in 5.5
UE - World Creation - Worldbuilding Tools - HLOD - Mar 17, 2025From licensee: We are using the legacy HLOD system in our game. With 5.5 there was a change to FSceneProxyBase::DrawStaticElementsInternal() where the implementation was removed (https://github.com ...
Fields with Maximum resolution are not affecting all leaves of a Geometry Collection
UE - Simulation - Physics - Destruction - Apr 25, 2025Fields with Maximum resolution are not affecting all leaves of a Geometry Collection on 5.4 and onwards. When calling GetRelevantParticleHandles() a Maximum Resolution field does return all particl ...
Cooked materials and material instances size have doubled when upgrading from 5.1.0 to 5.2.0
UE - Rendering Architecture - Materials - Jul 18, 2023UDN: [Link Removed] A UDN customer has observed that their cooked materials have doubled in asset size going from 5.1 to 5.2. We need to investigate this is only a local issue on their side and no ...
In UE 5.5, "Open Level By Name" is not able to find the map if the map is not added to "List of maps to include in a packaged build"
UE - Framework - Feb 13, 2025The "Open Level By Name" is not able to find the map to travel when the map is not included in the "List of maps to include in a packaged build" option. This issue was not happening in UE 5.3 and UE ...