AnimCurveCompressionSettings is reset to CompressedRichCurve at editor startup

OLD - Anim - May 21, 2019

AnimCurveCompressionSettings's codec is reset to CompressedRichCurve when user open the project, so user can not keep the state changed to UniformlySampled. The following code in the constructor of ...

Exposure Is More Extreme In High-End Mobile Preview Modes

UE - Platform - Mobile - Feb 16, 2017

In high-end mobile preview modes the exposure will return much more exaggerated results. This is related to the new default tone mapper settings since changing r.TonemapperFilm to 0 solves the issue ...

Load times for the editor appear to have increased

UE - Graphics Features - May 3, 2019

The editor appears to have longer load time as compared to an older engine version (4.20.3 loaded in seconds while newer version appear to load the same project in over a minute) ...

PerInstanceRandom does not work on Instanced Static Meshes spawned at runtime

UE - Graphics Features - Aug 11, 2017

PerInstanceRandom does not provide a random value when the material is being used on an Instanced Static Mesh that is spawned at runtime, the value is always the same. Regression?: Yes This did not ...

TArray64 RangeCheck prints the incorrect error messages for values over 32-bit length

UE - CoreTech - Apr 27, 2022

TArray64 RangeCheck prints the incorrect error messages for values over 32 bit. Repro Rate: 4/4 Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did occur there, it is not a regressi ...

TArrayView64 RangeCheck prints the incorrect error messages for values over 32-bit length

UE - CoreTech - Apr 29, 2022

TArrayView64 RangeCheck prints the incorrect error messages for values over 32 bit. Repro Rate: 4/4 Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did occur there, it is not a regre ...

ODSC - Launching a newly created project via UnrealFrontend fails to load some materials and crashes

UE - Rendering Architecture - Materials - Sep 6, 2021

The same repro steps on 4.26.2 will launch the project successfully. Packaging a project once to create complete ShaderMaps will work around the issue. ...

[CrashReport] Commandlet crash - UE4Editor_Engine!FAnimationUtils::CompressAnimSequenceExplicit() [animationutils.cpp:621]

OLD - Anim - Sep 7, 2017

This is an infrequent commandlet crash that has affected a number of users exclusively in 4.17.1 (possible regression from 4.17.0?). There are also two instances of older cases in 4.13 and 4.15, bu ...

Editor crash with Japanese ATOK input(candidate list related)

UE - Editor - UI Systems - Localization - Jul 5, 2017

This is probably a continuation from [Link Removed]. [Link Removed] fixed the crash with MS-IME input, but crash/instability can still happen with another Japanese input system, ATOK. ...

Network profiler crash

UE - Networking - Aug 6, 2020

Running with the -networkprofiler command line argument can crash the server on the first engine tick in FNetworkProfiler::TrackFrameBegin because the file writer archive hasn't been created yet. ...