Unreal Engine Issues
Unreal Engine Issues
Const Blueprint Implementable Events don't update if const is removed from the native declaration
UE - Gameplay - Blueprint Editor - Oct 19, 2021Constness is not updated in overridden BlueprintImplementableEvents when the native declaration is made non-const. ...
Blueprint compile error can occur when trying to override a BlueprintImplementableEvent that takes a custom enum as a parameter
UE - Gameplay - Blueprint - Mar 1, 2017When a BlueprintImplementableEvent that takes a custom enum as a parameter is overridden in a Blueprint, it will throw a compile error. The compile error states that the event cannot be overridden b ...
Compile button disappears and Hot Reload stops working after failing to Hot Reload in some cases
UE - Foundation - Core - Jun 2, 2016When failing to hot reload in some cases, the compile button in the editor will disappear and Hot Reloads will stop occurring. This tends to happen randomly in other scenarios but the method above i ...
Blueprint Library plugin set to 'Runtime' doesn't work in Standalone/packaged builds if used inside of the 1st Person Character BP
UE - Foundation - Cpp Tools - UnrealBuildTool - Nov 18, 2016Blueprint Library plugin set to 'Runtime' doesn't work in Standalone/packaged builds if used inside of the 1st Person Character BP. User Description: Blueprint libraries are still broken in the fi ...
r.VolumetricRenderTarget.PreferAsyncCompute producing different visuals
UE - Graphics Features - Aug 2, 2024When the cvar "r.VolumetricRenderTarget.PreferAsyncCompute" is enabled, it will cause Volumetric Clouds to ignore the influence of Volumetric Fog. In high-fog environments, this can cause the clouds ...
[bug] OIT doesn't work correctly with alpha composite blend mode
UE - Graphics Features - Substrate - Mar 4, 2025When using OIT, AlphaComposite Materials blend as if they are using the Translucent BlendMode. The order of macro #if … #elif cases cause AlphaComposite Materials to take the same route as Transluce ...
[MetaSounds] [Asset Importing] - Can't Import Wave Files Created from MetaSound Wave Writer
UE - Audio - MetaSounds - Jul 8, 2022Wave files created by the Wave Writer nodes in MetaSounds cannot be imported successfully into the engine. On my end, wave files created by Audacity could be imported successfully, so there does see ...
Compilation fails after binding an event to a server-only delegate property in the Blueprint editor.
UE - Gameplay - Blueprint Editor - May 24, 2019Attempting to bind a custom event to a server-only delegate property currently fails to validate after compiling a Blueprint. ...
Crash in RHIBreadcrumbs during loading of Bundled PSO Cache if capturing an Insights trace on Win64 Development
UE - Rendering Architecture - RHI - Feb 17, 2025When compiling a PSO, RHI Breadcrumbs can be fed a bad FRHIBreadcrumbNode, resulting in reading random memory and crashing during the recursive node iteration. This only happens when tracing. The i ...
Crash occurs when disabling Show > Static Mesh in the Viewport while using Vulkan
UE - Rendering Architecture - RHI - Oct 20, 2022This is a regression. Tested in: //UE5/Release-5.0 CL 20979098 - Crash did not occur. Crash occurs when disabling Show > Static Mesh in the Viewport while using Vulkan. ...