Unreal Engine Issues
Unreal Engine Issues
Reflection capture doesn't work with full dynamic lighting
UE - Graphics Features - Dec 27, 2019The Reflection Capture is not showing reflections for anything but the Sky Light when all Lighting is set to Fully Dynamic. This was reported and tested in 4.24.1 (CL-10757647). This was reproduce ...
Virtual Shadow Maps on Spot Lights cause a blocky presentation similar to an incorrect mip level
UE - Graphics Features - Shadows - May 26, 2025Spot Lights may present with very blocky shadow artefacts when a long attentuation radius is provided with a small cone angle. In extreme cases, this causes the VSMs to invalidate every frame. Notab ...
Directional Light settings remain from previous level when creating new level when using forward rendering
UE - Graphics Features - Jun 8, 2018Using Forward rendering, directional light settings persist across levels and after deletion. Video attached, shows problem in Dev-VR but same issue occurs in Release-4.20 ...
Changing the directional light from stationary to movable causes the mobile preview to show dark
UE - Graphics Features - Nov 5, 2014When Changing the Light source in the Sci Fi Hallway from stationary to movable, the room will become dark on Mobile preview. ...
Project fails to package with const BluperintFunctionLibrary function and Nativize Blueprints set
UE - Gameplay - Blueprint Runtime - Dec 8, 2016If a blueprint function library has a function that is const, the project will fail to compile if Nativize blueprint is set to true. ...
Unexpected Specular Highlights using Area Lights on Surfaces with strong Normals at Low Glancing Angles
UE - Graphics Features - Apr 17, 2017A licensee is reporting shimmering specular highlights on the surface of a mesh with an Area Light while using MSAA, FXAA, or no AA settings. This occurs in the Forward and Deferred Renderer. It wa ...
Crash upon adding an Interface to a Blueprint that has a function name that matches the name of a variable in the Blueprint.
UE - Gameplay - Blueprint Compiler - Oct 13, 2017When you add an Interface to a Blueprint that contains a variable with the same name as one of the Interface's functions, the editor will crash upon compiling the blueprint. In 4.16, this only cause ...
Material Parameters aren't unique if the Material Function has been duplicated
UE - Graphics Features - Jul 31, 2017Material Parameters aren't unique if the Material Functions has been duplicated, When the parameters are enabled in a Material Instance, one will be disabled on Material Instance close. This is a r ...
The ReceivedSpectatorClass function in APlayerController may take an incorrect parameter
UE - Gameplay - Jul 7, 2015The ReceivedSpectatorClass function in APlayerController may have an incorrect parameter. The parameter it takes in is TSubclassOf<AGameMode> SpectatorClass, but this may be intended to be TSubclass ...
Visual discrepancy between lighting in Cloud Presenter and editor viewport
TM - Rendering - Feb 24, 2026Reported in SF [Link Removed] In this user’s scene, the lighting in the Cloud Presenter does not match the lighting in the editor viewport. The Cloud scene is notably darker than the editor. The s ...