Unreal Engine Issues
Unreal Engine Issues
Custom Widget does not change cursor settings
UE - Editor - UI Systems - Nov 20, 2017When you are using a Custom Widget, changing the cursor setting does not change cursor during PIE or packaged games. only changing the cursor options in the original widget fixes the issue. This iss ...
Performance drop when spawning AI actors during runtime compared to placing them in world
UE - AI - Jan 9, 2019There is a performance difference between spawning and placing AI into a level. This is causing issues when spawning/despawning AI actors in a large open world, where 4-5ms of frame time quickly bui ...
Volumetric Lightmaps do not work with Landscape texture mapping
UE - Graphics Features - Feb 13, 2019It appears that the Lightmass Volumetric Lightmap does not work with Landscape textures. When it samples the Landscape with some textured material, the resulting lighting build data does not match t ...
Client movement and animation are heavy jittered on listen server
UE - Gameplay - Player Movement - May 10, 2019The listen server will see jitter in clients character movement and animations. This is hard to notice without the "slomo" command but is extremely obvious using "slomo". Clients will see server and ...
Sharing Material shaders wastes memory and disappears from the memreport
UE - Graphics Features - Jul 18, 2019Enabling bShareMaterialShaderCode breaks memory tracking and wastes memory due to issues in ShaderCodeLibrary. It is also worth noting that after cooking with bShareMaterialShaderCode enabled causes ...
4K Resolution and High DPI Scaling in Linux aren't completely affected by System Display Scaling
UE - Platform - Linux - Aug 26, 2019Unreal doesn't change appearance when changing system configuration display scaling options. Editor Texts are still quite small and don't change based on the Display Scaling %. This bug also causes ...
Replay playback can become paused indefinitely after scrubbing with high time dilation
UE - Networking - Feb 19, 2020When playing a replay with DemoPlayTImeDilation set to 5, and jumping around the timeline using GotoTimeInSeconds(), the play back can break, with game actors freezing and violently shaking. It seem ...
Lightmass ignores StaticSwitch in materialinstance
UE - Graphics Features - Aug 12, 2020This is caused by FLightmassMaterialProxy doesn't have GetStaticParameterSet() function. (FMaterial::GetStaticParameterSet() is called.) It can be fixed by adding the following function to FLightma ...
UDIM UVs are wrong
UE - Graphics Features - Feb 19, 2020UE4 applies 1-x transform to V coordinate when importing UVs from mesh. This is to handle GL/D3D differences in texture origin, but it breaks UDIM page addressing. It's possible to apply a fix to ...
SessionFrontend Causes Lost Audio on iOS After Switching Apps
UE - Audio - Oct 20, 2020When using SessionFrontend on some devices, when leaving the app (going to the home screen or another app) or sometimes locking the device there is no more audio after returning to the game. "It lo ...