Unreal Engine Issues
Unreal Engine Issues
The HISM will have double drawcalls when player opens r.Mobile.AllowDitheredLODTransition
UE - World Creation - Worldbuilding Tools - Foliage - Nov 2, 2020Please check the Function GetDynamicMeshElements in HierarchicalInstancedStaticMesh.cpp. The Function Traverse in GetDynamicMeshElements will always return two Lod levels, even the transition is f ...
.mp4s cannot be played in default projects in UE5.
UE - Media Framework - Apr 6, 2022In UE4 (using DX11), WmfMedia was able to play .mp4 files by default. However, WmfMedia doesn't support playing .mp4s in DX12, which is what is used in UE5. Electra can handle playing .mp4s in UE5, ...
When TSR is enabled, the maximum brightness is clamped to about 16000.
UE - Graphics Features - Jun 7, 2022You can also check it by enabling real-time rendering in the NewMap.umap of the attached project, and then clicking on "High Resolution Screenshots". (You may need to disable and enable post-process ...
Chaos : Rigid body sleeps when very small external force is applied by AddForce
UE - Simulation - Physics - Solver - May 25, 2022When a small external force is applied to the rigid body, the VSmooth value is reset in the ResetVSmoothFromForces function. Since this function ignores the current velocity, a very small velocity ...
InstanceOnly UProperties accessible in Blueprint
UE - Gameplay - Blueprint Editor - Nov 30, 2022Reproduced 3/3 times. Issue does not occur in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed Regression. ...
Atmosphere related scan line artifacts for Path Tracer with MGPU
UE - Graphics Features - Path Tracer - Feb 10, 2023There are two UDNs related to this issue. It makes the Path Tracer unusable with MGPU, with atmosphere enabled. I already have a one-line fix implemented and tested. The atmosphere scan line arti ...
When change a skeletal's collision from QueryOnly to QueryAndPhysics at runtime, dynamic properties won't be updated
UE - Simulation - Physics - Aug 23, 2023It seems in the FBodyInstance::InitDynamicProperties_AssumesLocked, we early out when the body instance's collision is QueryOnly, but actually we only recreate its physics state when changing from N ...
Build All Levels fails with duplicate level instances
UE - World Creation - Worldbuilding Tools - Level Instances - Jan 24, 2024[Device Swap] - Assertion failed: AudioStreamInfo.StreamState == EAudioOutputStreamState::Closed [File:D:\build\++UE5\Sync\Engine\Source\Runtime\AudioMixerCore\Private\AudioMixer.cpp]
UE - Audio - Jul 25, 2023Issue has been seen a couple times internally and closed as No Longer occurring. Looking at Crash Reporter, issue has been seen live a number of times. Looking at user logs, occurs after:LogAudioMi ...
Memory stomp in UTexture2DArray::SetPlatformData
UE - Texture - May 30, 2024A crash from bad memory access can happen when clearing the textures in a Texture2DArray asset. This appears to be because the order of operations when deleting the platform data is: ``` if (Privat ...