Landscape cooking takes as much as 6 times longer in 4.18

UE - LD & Modeling - Terrain - Landscape - Jan 10, 2018

Some developers are finding that the change to add a bunch of shader types to FLandscapeMaterialResource::GetExcludedShaderTypes() in 4.18.2 increased their project cooking times on PC or console by ...

Paint Mode button options disappear when toggling on "Use Small Tool Bar Icons" in the User Interface

Tools - Nov 30, 2017

When toggling on the "Use Small Tool Bar Icons" under the User Interface settings, the button options that sit directly under the Colors, Weights, and Textures options in Paint mode disappear. Thi ...

HLOD CalculateOverlap crashes when spheres barely overlap

UE - World Creation - Worldbuilding Tools - HLOD - Sep 16, 2019

The engine will crash when cluster bounds barely overlap. ...

URigVMBlueprint::CompileLog can spam the editor log when verbosity is set to Log

UE - Anim - Rigging - Control Rig - Jul 21, 2023

It seems that URigVMBlueprint::CompileLog is spamming the log whenever a call to BP_SCOPED_COMPILER_EVENT_STAT, including for blueprints that are unrelated to control rig.  The log messages are only ...

Texturing: RC 1.5 texturing hangs, RC 1.4.2 works fine with same dataset and workflow

RC - Texturing - Feb 13, 2025

Tested on the provided project, it looks like the unwrap was provided, but then the process stuck. I also checked the Task manager and there wasn't almost any activity for RealityCapture.[Image Remo ...

Special modifier key inputs do not register in editor if the key press occurs instantly

Tools - Mar 1, 2016

Special function key presses and hotkey shortcuts do not register in the editor if they fire key presses instantaneously (0ms). In particular, TypeMatrix keyboards reproduce this error using keyboar ...

Crash when adding sphere reflection capture to a scene

UE - Graphics Features - Jan 30, 2017

An occasional crash occurs when adding a sphere reflection capture to the scene from the place mode panel. This issue has a low repro, but has been seen a couple times. Repro rate seems to be around ...

Lighting channels on static mesh doesn't change correctly at runtime

UE - Graphics Features - Aug 28, 2020

If call SetLightingChannels in blueprint to set a static mesh's lighting channels at runtime, the mesh in the viewport seems can't update to the new lighting channel setting.  A weird thing is, if ...