Unreal Engine Issues
Unreal Engine Issues
Mobile Occlusion (ES3.1) is buggy with multiview enabled on Mobile VR platforms
UE - Platform - Mobile - Jul 31, 2018Launching on VR Mobile platform with Mobile Multiview and OpenGL ES3.1 enabled breaks occlusion. Also occuring in Main @ CL4235929 Users example project attached, also confirmed in VR Template. ...
Gamepad input affects multiple game instances at once, due to not needing focus.
UE - Editor - UI Systems - Slate - Mar 5, 2019Since Gamepad input works without needing focus (which was added in 4.9 with [Link Removed]), a Gamepad's input will also affect all instances running on the same computer. Regression?: No This occ ...
Pass names appear as "RDGEvent" in Unreal Insights when r.rhisetgpucaptureoptions=1
UE - Rendering Architecture - RHI - Dec 2, 2025When capturing a trace in Unreal Insights, all r.rhisetgpucaptureoptions=1 (r.RDG.Events=3) all RDG pass events appear simply as RDGEvent, without the actual name due to the logic for RDG_EVENT_SCOP ...
Shader Symbols not Generated for Windows Platform when r.Shaders.Symbols=1
UE - Rendering Architecture - Shaders - Feb 28, 2025Shader symbols are not generated for the Windows platform. Attempts were made to set the r.Shaders.Symbols=1 value in the projects DefaultEngine.ini, the engines ConsoleVariables.ini and the engine ...
RetargetSource in AnimSeqeuence doesn't affect DDC key
UE - Anim - Runtime - Aug 4, 2020Retarget source doesn't affect DDC key, so it causes incorrect result. Changing the anim sequence DDC key generation to include it fixes this issue. ...
UMG Slider displays long or wrong percentages when Step Size is set to 0.1
UE - Editor - UI Systems - Apr 24, 2020When the Step Size is set to 0.1 for a Slider and Slider value is multiplied by 100, it will display weird numbers when moving the slider back from 100%. Changing the Step Size to 1 and changing th ...
LODs with screen size 0 in legacy assets are incorrectly converted to 1 on load
UE - Editor - Content Pipeline - Sep 11, 2025When loading a mesh asset (static or skeletal) created in an old version of Unreal (e.g. 4.10), any LOD whose LOD screen size was originally set to 0, is converted to 1. This causes LODs that would ...
Texture Sample 2D Parameter not Working with WPO on Mobile Quality ES3.1
UE - Platform - Mobile - Jun 30, 2017WPO does not accept TextureParameter2D nodes when deployed to High End Mobile. The interesting thing is that all other inputs accept Param2D, so it is not entirely clear why WPO is not working. If ...
Visibility of World Outliner doesn't affect skylight
UE - Graphics Features - Nov 27, 2018Visibility of World Outliner doesn't affect skylight. But it affects other kinds of lights like Point Light, Directional Light. I found that USkyLightComponent::CreateRenderState_Concurrent() doesn ...
NavMesh does not update properly when "Can Ever Affect Navigation" is toggled (For Static Meshes)
UE - AI - Sep 15, 2015This issue is related to [Link Removed] (which was fixed). However if the user creates a new actor and then adds a static mesh they can end up with permanent holes in their nav mesh. If the user tog ...