Unreal Engine Issues
Unreal Engine Issues
Debug Helpers no longer drawn indefinitely if life time is set to 0 or less
UE - Graphics Features - Sep 10, 2018Setting the lifetime for one of the visual debug helpers (a sphere was used in the repro, but the results should be similar for any of the debug helpers) to a value of 0 or less should make the debu ...
Crash when setting Retainerbox scale is set to 0 at runtime
UE - Editor - UI Systems - Jan 22, 2021Crash at runtime when Retainerbox scale is set to 0. The call stack indicates that the size of RenderTarget2D is set to 0. Attached repro project sets the scale of the RetainerBox that wraps the Im ...
Mip Gen Blur Settings affecting Mip Level 0 when setting the Maximum Texture Size
UE - Graphics Features - Jul 7, 2017When Blurring a Texture using Mip Gen Settings and setting the LOD Bias or Maximum Texture Size, the blur gets applied to the base Mip Level 0. This behavior is contrary to how it behaves when blur ...
Setting an overlay's alpha to 0 does not display as fully transparent
Tools - Feb 19, 2020Safe zone overlay ignores alpha when set to 0.0 in DefaultEngine.ini. Tested: 4.23.1 CL#9631420 , 4.25 CL#11341939 ...
Attached actor rotates incorrectly if the parent has negative scaling on one axis and more than 1.0 scaling on another
UE - Gameplay - Dec 27, 2016A child actor rotates incorrectly if the parent has negative scaling on one axis and more than 1.0 scaling on another. The child/parent relationship was created through the World Outliner. Licensee ...
[Feature Request] Improve the comment on the Finterp family of functions to better explain the parameters and maybe edge cases like what happens when speed is 0)
UE - Gameplay - Apr 24, 2017Some users are finding the result of an interp speed of 0 for the FinterpTo node to be unexpected. The reasoning expressed is that if the speed is equal to 0 that there should be no change. This would ...
Volumetric clouds are jagged along mesh edges when Fog Height Falloff is 0
UE - Rendering - Jul 27, 2026Volumetric clouds are composited against opaque mesh silhouettes at a reduced resolution. A blocky and jagged edge appears along the silhouette. The fog brightness of the clouds also changes abruptl ...
Failed to build in Github UE4.27.0.
UE - Runtime - Simulation - Aug 30, 2021Failed to build UE4.27.0 with Win64/Development Editor. Can avoid this error that excluding the project from build configuration. (Solution UE4->Properties->Configuration Properties->Configuratio ...
The results of Roughness=1.0 from a constant and from a parameter are different on 4.20.
UE - Graphics 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 ...
Raytraced lights with Source Length > 0 behave incorrectly with Megalights
UE - Graphics Features - Ray Tracing - Mar 26, 2025When Megalights is enabled, light can leak into areas that should be occluded for lights with smallish (5.0) source length and source size. [Image Removed][Image Removed] This was taken with r.Ray ...