Unreal Engine Issues
Unreal Engine Issues
Add support for motion data on SteamDeck (Steam Controller plugin)
UE - Gameplay - Input - Mar 7, 2025We have a UDN user with a proposed change: https://udn.unrealengine.com/s/question/0D5QP00000yo70w0AA/add-support-for-gyro-motion-data-to-steam-controller-plugin?fromCase=1 Hi, we were adding gyr ...
[CrashReport] UE4Editor-MetalRHI.dylib!FMetalDeviceContext::CreateDeviceContext()
UE - Graphics Features - Feb 10, 2017Error message: SEGV_MAPERR at 0x3 Source Context: Most recent user affected CL: 3249277 Logs: [Link Removed] [Link Removed] [Link Removed] [Link Removed] CrashReporter User Descriptions:Just i ...
SetBlendState has HDR UI override baked in
UE - Rendering - Architecture - Mar 20, 2026SetBlendState() is called from non-UI code but has HDR UI overrides baked in. The UI specific code should be moved to the UI code that calls SetBlendState() - likely in FCanvas, or the function sho ...
Significant hitch occurs when invoking ApplySettings on a UGameUserSettings object
UE - Rendering - Graphics Features - Jun 18, 2025Calling the ApplySettings method on a UGameUserSettings object results in a noticeable hitch, with severity proportional to the number of primitive components present in the scene. This hitch stems ...
SkyLight Leaking does not affect reflections when the SkyLight is static but static lighting is disallowed
UE - Rendering - Graphics Features - Sep 10, 2025Reflections do not receive SkyLight leakage contribution from a static SkyLight when static lighting is disallowed. This is caused by the function UpdateSkyIrradianceGpuBuffer checking if the SkyLig ...
GAS: OnTagUpdated() not called when calling SetLooseGameplayTagCount()
UE - Gameplay - Gameplay Ability System - Dec 10, 2024Context AbilitySystemComponent has a virtual function virtual void OnTagUpdated(const FGameplayTag& Tag, bool TagExists); that gets called when a gameplay tag gets added or removed, so whenever ...
Key precision problems on some short animations
Tools - Apr 5, 2016Please see attached UE4_anim_interp_bug.fbx for a second example. This works as expected in 4.7 and 4.8 I've got a couple different users reporting this now. I suspected animation compression to ...
lots of wasted Volumetric lightmap samples
UE - Graphics Features - Lumen - Jun 20, 2019Expectations: The samples should only surround the lightmass importance volumes. Imagine if we build a 8K*8K map with lightmap importance volume at the corners of the map, even using stream levels ...
Unnamespaced UnrealMathUtility.h macros clash with other headers
UE - Core - Systems - Jan 25, 2022Reported here: [Link Removed] > See this commit: > > https://github.com/EpicGames/UnrealEngine/commit/acd754e12dc9a7ffc7f173c8433a6bafc0262b51#diff-b18d4f9b879748fdacff2caa885b231e8c9e0b899d90d5d ...
Volumetric Translucent Shadows will only work if you select the mesh, doesn't show up in game
UE - Graphics Features - Aug 18, 2015When using Volumetric Translucent Shadows for static meshes the shadows will only work if the mesh is selected. When the mesh is deselected it will not render. This worked in 4.8.3, but is broken ...