Unreal Engine Issues
Unreal Engine Issues
LoadMapMisc LLM category contains Static Mesh allocations
UE - Rendering Architecture - Nov 12, 2024UInstancedStaticMeshComponent::CreateSceneProxy() is missing a LLM_SCOPE(ELLMTag::InstancedMesh); and during level loading allocations for it appear in LoadMapMisc instead of InstancedMesh. Addi ...
“Receives Decals” is not respected on Procedural Mesh Component
UE - Graphics Features - Oct 14, 2022(Enduring Games) I investigated it and found that the following primitive data flag test in BasePassPixelShader.usf fails: (GetPrimitiveData(MaterialParameters).Flags & PRIMITIVE_SCENE_DATA_FLAG_DE ...
Unreal Lightmass does not build by default when building Solution from Promoted Github 4.12
UE - Foundation - Cpp Tools - UnrealBuildTool - Jan 19, 2016When building the Promoted 4.12 Solution from Github as of the 4AM commit, the Unreal Lightmass project does not build by default. This results in the inability to build lighting until Unreal Light ...
Opening or Creating a Material with SubSurface Profile will Crash Editor with LPV enabled
UE - Graphics Features - Dec 22, 2014After enabling Light Propagation Volumes with the console variable r.LightPropogationVolume=1, opening or creating a material with the subsurface profile model will crash the editor. Broken in 4.6. ...
Material Instance Parameter Values Reset When Renamed
UE - Rendering Architecture - Materials - Nov 27, 2017Per Licensee: We would like to change some of their parameter names, however when renaming a parameter, its value in all of the corresponding material instances resets to the base material default ...
SingleLayerWater with PixelDepthOffset gives wrong refraction
UE - LD & Modeling - Terrain - Water - Oct 29, 2020We can see refraction gets distorted after we have a bigger PDO value, and it's not because the depth is more shallow, but looks like some kind of scene color texture lookup error. Also, not sure i ...
The GetCombinedForces put out wrong value when the vehicle is reversing
UE - Simulation - Physics - Aug 19, 2022Reproduced 3/3 times. A similar bug occurred with PhysX ([Link Removed]) Check the function: FVector FSimpleAerodynamicsSim::GetCombinedForces(float VelocityIn) if the velocityIn is negative, th ...
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 ...
Editor freezes then crashes while attempting to save during PIE
UE - Gameplay - Blueprint - Jun 8, 2015A level blueprint that has blueprint functions on keybound events freezes and crashes when in PIE and save is pressed. Frequency: 7/7 Crashreporter: [Link Removed] Note: If all level blueprint n ...
AIController.BrainComponent not being set to user-created BehaviorTreeComponent instance
UE - AI - Apr 30, 2015If a user manually created a UBehaviorTreeComponent for his custom AI controller, but forgets to set AIController.BrainComponent to point at that BT component then a fair amount of assumptions break ...