Unreal Engine Issues
Unreal Engine Issues
Materials with transparency still visible in alpha with holdout in Render layers.
TM - Tools - Mar 8, 2024The Transparent materials like the Glass don't behave correctly in Raster (in PT is working as expected). They are visible in Alpha with Holdout. This is an Engine limitation for now. But we sho ...
External Actors can hold stale references to Blueprint classes as edited instance properties
UE - Engine Scaling - Streaming - Nov 14, 2024When a component is removed from a class that exists as an instance with external actors enabled, a deleted BP component on an actor will remain referenced by the instance. Disabling External Actor ...
Nanite mesh not culled when owner is editor only actor in gameview
UE - Rendering - Features - Nanite - Mar 29, 2024Nanite mesh is not culled because "DrawInGame" value in the primitive uniform buffer is always 1. Can be fixed with below modification:// in FPrimitiveSceneProxy::FPrimitiveSceneProxy DrawInGa ...
UInstancedStaticMeshComponent::AddInstances does not appear to be adding per-instance previous transforms when enabled
UE - Rendering - Features - Dec 3, 2025Instanced static mesh component does not add instances transforms to PerInstancePrevTransform array when using UInstancedStaticMeshComponent::AddInstances. Additionally Updating the transforms of th ...
On the Details Panel of Niagara Function Inputs, the Type selector does not show "Static" types.
UE - Rendering - Architecture - Niagara - Apr 7, 2025Consider a Niagara Function or Module Script containing a Static Switch node. If the "Expose as Pin" option is enabled for its selector variable, an input pin with type "static bool" appears. In one ...
Cannot Delete Event Dispatcher inside of a child blueprint when the parent has an event dispatcher as well
UE - Gameplay - Blueprint - Apr 2, 2015If the user creates two blueprints and parents one to the other and then creates 3 event dispatchers in total between the two in an alternating method it will cause and error and the event dispatch ...
Building lighting fails on Linux
UE - Platform - Linux - Jan 15, 2016When building lighting on Linux, the build process fails because UnrealLightmass cannot find the library libUnrealLightmass-Serialization.so. Reported using Mint Cinnamon 17.3 Internal machine uses ...
Refraction breaks Translucent Sort Order without Separate Transparency Enabled
UE - Graphics Features - Jan 6, 2016With multiple Translucent Material sorted in 3-D space or via Transparency Sort Priority, if one of the materials uses refraction it will render on top of the others no matter position or sort prior ...
Translating bones in Persona is not affected by Snap Options
OLD - Anim - Dec 14, 2016In Persona, moving a socket around is not affected by any changes to snapping (scale or size). Rotation is affected however. This is similar to [Link Removed], but according to James Golding there ...
changing physics type to simulated causes bodies to simulate in phat
UE - Simulation - Physics - Jan 18, 20171. open qa game 2. open a physics asset with multiple bodies 3. select a body and set its physics type to Simulated. 4. Notice simulation starts immediately even though we are not simulating. ...