Unreal Engine Issues
Unreal Engine Issues
UV Import layout error increases with movement of UVs away from 0-1 Space
Tools - May 27, 2015When a user sets up an unwrap using a space outside the original 0 to 1 space the unwrap will increasingly show errors of positioning. For Example, in the following images the lower left vertex of ...
With Use Fixed Frame Rate turned on, time-based elements of the Editor appear to operate at incorrect rates.
Tools - Oct 29, 2015Turning on the Use Fixed Frame Rate option for a project causes time-based elements of the Editor to operate at incorrect rates. ...
Cannot Import Sound File with Duration Less Than 1 Second
UE - Audio - May 29, 2015Unable to import a sound file shorter than 1 second in length. The two sound files attached are the same sound, but one has been extended to at least 1 second long and successfully imports. ...
Nanite Voxel material with Static Lighting fails shader compile when r.VelocityOutputPass=1
UE - Rendering - Features - Nanite - Oct 16, 2026Engine/Shaders/Private/Nanite/NaniteVertexFactory.ush:959LightMapCoordinateInput = GetTexCoord(Cluster, uint3(Verts[0].VertIndex, Verts[1].VertIndex, Verts[2].VertIndex), Barycentrics, LightMapUVInd ...
The results of Roughness=1.0 from a constant and from a parameter are different on 4.20.
UE - Rendering - Features - Sep 4, 2018The results of Roughness=1.0 from a constant and from a parameter are different on 4.20. The static bool switch of the following material always returns 1.0. But the results are different.[Link Rem ...
Using a fixed frame rate will cause you to leave the loop section of Montage.
UE - Runtime - Animation - Dec 10, 2021This problem only occurs when the fixed frame rate is 30 and the Sequence Lenngth of the loop animation is 1.66667. If turn off the fixed frame rate setting, it will behave as it should. ...
Analog Input does not work for network clients (AddMovementInput scale values other than 0 and 1 do not replicate for clients)
UE - Gameplay - Jun 26, 2015If a value other than 0 or 1 (Ex. 0.1) is put into the 'Scale Value' parameter for the Add Movement Input node, any clients will respond as if the value is 1. User claims this worked in 4.6. ...
[5.8] Cherry-pick CL 55798320: re-precache PSOs in ULandscapeComponent and UGroomComponent OnRegister (fixes bPSOPrecacheCalled ensure on re-register)
UE - Rendering - RHI - Oct 21, 2026In 5.8, UPrimitiveComponent::OnUnregister resets FPSOPrecacheComponentData, which clears bPSOPrecacheCalled (regression from CL 48140040). ULandscapeComponent and UGroomComponent only call PrecacheP ...
Using Fixed Frame Rate Increases the Speed of Auto Save
UE - Foundation - Core - Oct 26, 2015Using a lower fixed frame rate (i.e. 20fps) causes the auto save timer (when set to the default of 10) to count down in 3 seconds. Found in 4.10 Preview 2 CL 2733139. Reproduced in 4.9.2 binary an ...
Fix BinkMediaTextureResource command list crash on UE 5.6
RAD - May 23, 2025Bink MediaTextureResource assets cause a graphics API crash, due to a missing UAV flag. The Licensee has proposed a fix to add the TexCreate_UAV flag. ...