Unreal Engine Issues
Unreal Engine Issues
UConsole HistoryBuffer no longer writing to disk in packaged builds
UE - CoreTech - Sep 7, 2023We started running into issues with the console history not saving after upgrading to 5.2.1. The console history (as in the commands last input into the in-game console) is no longer being saved bet ...
Masked TwoSided material causing lumen direct lighting to leak through walls
UE - Graphics Features - Lumen - Apr 23, 2024It appears that LumenScene's Hardware Ray Tracing is causing light leaking into a sealed room (which should be perfectly black). This bug does not appear to happen on AMD GPUs. ...
High Virtual Texture Sample/Lookup Cost when using a Virtual Texture in a Material Layer Blend
UE - Rendering - Architecture - Materials - Mar 14, 2025Some Material Attribute blends in Material Layer Blends can cause Virtual Texture samples to be duplicated in HLSL. This can be avoided by sampling the Virtual Texture in the Parent Material, and pa ...
Custom Depth range is different than Pixel Depth range
UE - Graphics Features - Sep 25, 2025Shaders that compare custom depth and pixel depth get wrong output values because the ranges are different. This error is most noticeable over large distances. The difference in ranges is due to t ...
Crash when playing with Vulkan Mobile Preview
UE - Platform - Mobile - Sep 21, 2017Occasionally getting a crash when playing with Vulkan Mobile Preview. Have not had it repro 100% of the time. ...
Audio Components ignoring Start Time set by Play node on Android
UE - Audio - Jul 15, 2015Setting the start time within the Play node for an audio component does not function when deploying to Android. The set up works fine when playing on the PC, and the sound functions on the Android ...
Lightmass GI doesn't work with Material-based color changes
UE - Graphics Features - Sep 4, 2015A licensee is having trouble getting the visual results they want because Lightmass doesn't seem to handle color changes from materials. They are seeing this in 2 cases: (See attached images and tes ...
Orthographic Camera view doesn't work with movable directional light shadows and partly with stationary shadows
UE - Graphics Features - Feb 26, 2015See attached video for clear examples. When using the orthographic camera perspective with default light settings to stationary for directional light source. Other light sources work as intended. T ...
Actor with Camera Component UProperty causes ensure when PIE ends if replicating
UE - Networking - Nov 17, 2015If an Actor with a CameraComponent is set to replicate, ending a PIE session with 2 players will result in an ensure ...
[CrashReport] Crash while snapping multiple actors at once
Tools - Aug 29, 2017Crash occurs when selecting all actors and pressing "End" to snap them to the floor. This doesn't occur if you create a blank map and add a few actors to it. The specific conditions may need to be ...