Unreal Engine Issues
Unreal Engine Issues
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 ...
Failed to build in Github UE4.27.0.
UE - Simulation - Physics - 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 ...
Editor will freeze if anim composite has an animation with a notify and length of 0
OLD - Anim - Mar 21, 2019An anim composite will freeze the editor if one of its animation segments has a a notify and a length of 0 or less. Debugging shows that the engine is stuck inside UAnimSequenceBase::GetAnimNotifies ...
Ad banner is displayed incorrectly on Android 7.0 devices
UE - Platform - Mobile - Feb 24, 2017GameActivity.java needs to be updated to show the ad popup window on Android 7.0 devices. GameActivity.java uses Gravity.BOTTOM or Gravity.TOP to place the ad. One thing to try would be to edit ...
Fix delegate problems with Blueprints
UE - Foundation - Core - Feb 18, 2015https://udn.unrealengine.com/questions/236428/bug-blueprints-executing-zombie-code.html Blueprint MyCharacter is based on native class CodeFirstPersonCharacter. CodeFirstPersonCharacter has compone ...
Large snap scaling causes meshes to scale 0
UE - Editor - Workflow Systems - Mar 3, 2016With a large snap scale just selecting the uniform scaler will make the content scale to 0. It seems like it is far too easy for meshes to accidentally be scaled to 0 with snap scaling. Another exa ...