Unreal Engine Issues
Unreal Engine Issues
Importing animation onto a camera in Sequencer adds extra keys to the scale and rotation attributes
UE - Anim - Sequencer - Oct 22, 2019When importing non-baked animation (i.e. not keyed on every frame) onto a camera in sequencer, Unreal adds extra keys to the rotation and scale attributes as if it is baking the rotation and scale a ...
InstancedStaticMesh displaying corrupt lightmap data
UE - Graphics Features - May 17, 2021I think I narrowed this issue down to bad UV coordinates being interpreted during the BasePassVertexShader execution applied to instancing. At this line in VertexFactoryGetInterpolantsVSToPS: flo ...
Investigate Streaming getting disabled on a World Partition map as a side-effect of loading the map as a regular asset
UE - World Creation - Worldbuilding Tools - World Partition - Apr 1, 2025We recently encountered an odd issue where loading into our main world partitioned map would result in a crash caused by all streaming cells getting loaded at the same time. Turns out this was cause ...
Compiling twice then pressing play/stop after creating a c++ Game Instance causes a crash
UE - Foundation - Cpp Tools - Live Coding - Jan 24, 2022This is not a regression. After creating a C++ based Game Instance the Editor crashes if you compile twice then play and stop. ...
Opening a Level inside the ReferenceViewer does not Prompt the Save window if the Level is dirty.
UE - Editor - Applied Usability - Apr 15, 2024If you right click on a level node in the reference viewer and choose edit, it will bypass prompting you to save unsaved changes in your current level, silently discarding all unsaved work. ...
UE5.4 Regression - crash when disabling shader optimization while raytracing is enabled on D3D12
UE - Rendering Architecture - Shaders - Jul 15, 2024Certain interactions between a Rect Light with a Light Function and a Post-Process volume lead to a check() when compiling a Ray Tracing PSO for tracing lights. This check() only happens when shader ...
Crash in FObjectReplicator::StartReplicating when removing replicated uproperty and hot reloading with two players
UE - Networking - May 10, 2016The editor crashes when the user removes the replicated uproperty from a variable and tries to hot reload while a PIE session with two players is still active. This issue was found while trying to ...
Cannot generate a callstack from the user's dll
UE - Foundation - Core - May 26, 2015The dumplogs and any other logs requested from this user are listed within this AnswerHub post. I do have the DMP logs currently on my PC if you're unable to download them, they're 1.9GB Jarek S. h ...
Physics objects will bounce unrealistically just before coming to rest
OLD - Anim - Jun 5, 2017Physics objects will bounce unrealistically just before coming to rest. This is most noticeable with the large cube in the 1st Person template project. It also happens with the smaller cubes but not ...
Lightmaps on Mobile Devices Appear Dirty and Blurry
UE - Platform - Mobile - Nov 28, 2017When deploying project to a mobile device, the quality of the baked lighting and shadows becomes very poor compared to "Mobile Preview." Lightmaps appear dirty and blurry, with splotches (As shown i ...