World Origin Shifting Rendering Desync On Play

UE - World Creation - Worldbuilding Tools - World Composition - Jan 27, 2020

Ortho near plane clips geometry in Editor Top view

UE - Graphics Features - Aug 9, 2024

When the viewport is in Top (ortho) Lit mode the near plane clips through geometry as you zoom the view in and out. ...

When multiple HLODs are set, the transition does not occur correctly

UE - Graphics Features - Aug 30, 2019

The [bIsVisible] flag is set to [1] by the following judgment.const bool bIsInDrawRange = DistanceSquared >= Bounds.MinDrawDistanceSq * HLODState.FOVDistanceScaleSq; Judging from this code, I bel ...

Warning in Net.PacketNotify Test

UE - Networking - Jan 27, 2021

Warning when running the packet notify test, regarding missed acks. ...

Incorrect collision of merged actor that was merged from a Spline Mesh Component

UE - Simulation - Physics - Apr 10, 2017

Incorrect collision of merged actor that was merged from a Spline Mesh Component Licensee description: We often use spline mesh blueprints to generate organic art for us, like roots, trees, and r ...

Engine Crashes When Previewing ES3_1 With Material Using World Position Offset (Need Custom Stencil)

UE - Platform - Mobile - Feb 15, 2017

This crash will only occur when this criteria is met.You have enabled custom depth with stencils in the project settingsA mesh in the scene is rendering to custom depth with a stencil value of 1The ...

Doing a Rebuild in Visual Studio fails to compile

UE - Foundation - Cpp Tools - UnrealBuildTool - Apr 19, 2016

Attempting to use the Rebuild option in Visual Studio will fail to build the project. It instead produces a message that "Epic was unexpected". ...

Blueprint Actor with instance editable variables that are named with brackets cannot have their default values duplicated

UE - Gameplay - Oct 26, 2018

When copying a Blueprint actor, Variables with brackets in their names don't have their values copied. IE: Creating a vector variable named "MyVector[]" This behavior also replicates with round brac ...

Actor attached to other actor in LevelInstance has very large bounds

UE - World Creation - Worldbuilding Tools - Level Instances - May 26, 2023

Attached actors do not return to LevelInstance space at the end of LevelInstance editing, and bounds contains level instance offset location. This results in huge bounds. My workaround is:  void FL ...

Refraction not calculated when using Material Property Overrides Blend Mode

UE - Graphics Features - Sep 10, 2015

Found in the process of replicating the linked Answerhub. When an opaque material is setup as a master material with the intent to have an Opaque and Translucent version, the material instance will ...