Unreal Engine Issues

Custom node not working with material attributes

Using Material Attributes as an input to a Custom Expression causes the HLSL Translator to create multiple CustomExpression# functions, for each used member of the Material Attributes, rather than u ...

High Virtual Texture Sample/Lookup Cost when using a Virtual Texture in a Material Layer Blend

Some Material Attribute blends in Material Layer Blends can cause Virtual Texture samples to be duplicated in HLSL. This can be avoided by sampling the Virtual Texture in the Parent Material, and pa ...

Creating an exposed variable does not always update correctly to the bp's Details panel

Creating an exposed variable does not always update correctly to the bp's Details panel. They will show as having multiple values until the bp is clicked off and back onto. ...

PhysX generates extra "sleep" event when moving Kinematic actors away from Simulated actors with Teleport option.

Issue seems to be related to NpRigidDynamic::setKinematicTarget. When called by itself (like in the case of Kinematic bodies moved without teleportation), the simulated actor is woken and is put ba ...

[CrashReport] Crash while snapping multiple actors at once

Crash occurs when selecting all actors and pressing "End" to snap them to the floor. This doesn't occur if you create a blank map and add a few actors to it. The specific conditions may need to be ...

Particle record in the Matinee leads to crash when playing after record.

Particle record feature in the matinee seems not properly working in the Editor. When trying to play in the matinee with recorded keys, the Engine will crash with Access violation - code c0000005. ...

[CrashReport] UE4Editor_Engine!USceneComponent::DestroyComponent() [scenecomponent.cpp:847]

[Edit]: This should no longer be a crash as of 4.19.2 - we should only get ensure() reports with this callstack. ===== This is a common crash coming out of 4.18. Users have not provided any descript ...

Vray Material nodes are disconnected after saved if closing and re opening Unreal

Client crashes after second seamless travel when a blueprint manually placed in the world spawns a replicated actor

When a user loads into a level that spawns replicated actors using manually placed blueprints twice using ServerTravel with Seamless Travel enabled it will crash. It looks like the engine can't find ...

With Ray Tracing Enabled And The RenderDoc Plugin Enabled Shadows Don't Render Correctly On Reflective Materials

When the RenderDoc plugin is installed with raytracing enabled shadows don't render correctly. Found in 4.24.1 CL#10757647 Reproduced in 4.23.1 CL#9631420, 4.25 Main CL#11087956 ...