Unreal Engine Issues
Unreal Engine Issues
Can't set "r.Shaders.Optimize" to false in UE5.4
UE - Rendering Architecture - Shaders - Jun 7, 2024The CVar "r.Shaders.Optimize" cannot be set to false from DefaultEngine.ini in the section "[ShaderCompiler]" as its help text describes. Also tested on UE5-Main, CL: 34200103 ...
Some texture files cannot be exported from the editor
Tools - Feb 4, 2015There are instances where some texture files cannot be exported from the editor. In this older post a user had reported this with the file T_Sky_Blue from the engine folder. Only this file has been ...
Lack of multi-bounce when using software traced lumen radiosity
UE - Graphics Features - Lumen - Apr 4, 2025Certain Lumen Hardware Ray Tracing CVars, when disabled in isolation, will not fall back to tracing the Global Distance Field, because the Global Distance Field is still disabled. The function "Lum ...
Setting linear dampening during runtime via the event graph does not work for separated chunks
UE - Simulation - Physics - Destruction - Dec 18, 2014DESCRIPTION: When using a DM in blueprints and setting the linear dampening in the event graph the DM will honor the linear dampening but the chunks as they break off will not. Setting the mesh to ...
[MetaSounds] - Sound Waves used in composition cut out after GC in packaged game if the reference graph uses a literal input
UE - Audio - MetaSounds - Mar 18, 2022When a Sound Wave is set on a referenced node, and that node is used in composition, the Sound Wave will cut out after some time. This does not occur if the reference node uses an Input node for the ...
Cannot set the Rotation value of an Instance Static Mesh component if the scale is set to zero
UE - Gameplay - Feb 3, 2015Cannot set the Rotation value of an Instance Static Mesh component if the scale is set to zero. This can be done with StaticMesh components and standard Static Meshes in the level. ...
Actor components in blueprintable structs are uneditable in full BP editor, but not on instanced actors or in data BP editor
UE - Gameplay - Blueprint Editor - Jan 24, 2024When an actor has a blueprintable struct that contains a reference to an actor component and that component is created default in the actor's constructor, the struct and the component will be unedit ...
UGeometryCollectionComponent::EventDispatcher gets registered for events twice what can result in duplicate collision events being fired
UE - Simulation - Visual - Sep 18, 2024UGeometryCollectionComponent::EventDispatcher gets registered for events twice, once in UGeometryCollectionComponent::RegisterForEvents() and again in UChaosGameplayEventDispatcher::OnRegister(). Th ...
Construct object fails to assign a value when using the level blueprint - ConstructObject node issue
UE - Gameplay - Blueprint Compiler - Feb 28, 2018https://udn.unrealengine.com/questions/419239/uk2node-genericcreateobject-compile-issue.html ...
Pasting custom data floats from a text editor into a instanced static mesh component crashes the editor
UE - Framework - Components - Aug 5, 2024When an instanced static mesh component with a material using a PerInstanceCustomData node has its data floats pasted in, the editor crashes with an "Array index out of bounds" error. The licensee w ...