Unreal Engine Issues
Unreal Engine Issues
UbaAgent in 5.7 depends on qwave.dll, which is not available on Server Core
UE - Core - Cpp Tools - UnrealBuildAccelerator - Nov 19, 2025A licensee runs UbaAgent on Windows Server Core. This worked in 5.5 and 5.6, but broke in 5.7. After some investigation, they found that UbaAgent took a new (hard) dependency on qwave.dll in order ...
With Accurate Velocities from Vertex Deformation and Instanced Stereo enabled anti-aliasing does not affect the right eye
UE - Platform - XR - Jul 8, 2016KevinR: Make sure you are using Temporal AA (TXAA), and I was using SteamVR/Vive With Accurate Velocities from Vertex Deformation and Instanced Stereo enabled anti-aliasing does not affect the righ ...
[MetaSounds][Trigger Route] - If Value 0 is a non-zero value and Value 1 is a zero value, the output "pops" on triggering Set
UE - Audio - MetaSounds - Mar 18, 2022When using the Trigger Route node, if Value 0 is a non-zero value and Value 1 is a zero value, the output "pops" on set. [Link Removed] ...
Changing reflection capture resolution after setting preview rendering level to Android ES3.1 crashes the editor
UE - Graphics Features - Nov 20, 2019Applying a new reflection capture resolution after changing Preview Rendering Level to Android ES3.1 results in crash. Tested in: 4.24 P3 CL#10283392 4.25CL#10303496 ...
Material Parameter Collection Track doesn't work in UMG Preview from 5.7
UE - AI Workflows - UI Systems - UMG - Feb 12, 2026The UMG editor allows us to add a Material Parameter Control track to an animation. This track makes it possible to animate parameters used in a material. Designers can scrub the timeline and previe ...
Foliage Instance Static Meshes do not affect the Navmesh
UE - Runtime - Character - Apr 25, 2022Foliage Instance Static Meshes do not affect the Navmesh. I tried changing the Custom Navigable Geometry to 'Yes' & 'Even if Not Collidable' but got the same results. Repro Rate: 4/4 Tested this i ...
Cannot "hit" character in PhysicalAnimation Content Example 1.2
Docs - Samples - Oct 8, 2015Cannot "hit" character in example 1.2 of the PhysicalAnimation map in Content Examples Does not occur in 4.8.3 ...
Foliage is removed when erasing with Erase Density set to 1
UE - World Creation - Worldbuilding Tools - Foliage - Aug 19, 2016I found with a high density of foliage instances, you're able to erase some of them even when Erase Density is set to 1.0 ...
Translucent materials that use a render target has an incorrect alpha when using ES3.1 Preview in Editor
UE - Graphics Features - Aug 20, 2019The opacity of a render target used in a material appears to get over written when previewing Android ES3.1 in PIE if the material is set to be translucent. ...
Draw Line in HUD does not respect alpha < 1.0
UE - Gameplay - May 2, 2016Draw Line in HUD does not respect alpha < 1.0, instead drawing completely opaque in all circumstances. Regression (No) issue (does) occur in 4.10.4 ...