CMakefile does not generate includes and definitions on Linux

UE - Platform - Linux - Oct 9, 2015

Generating CMakeLists.txt does not properly create includes and definitions causing project files genereated by Cmake to not have these includes and the indexer to not be able to resolve most of the ...

Blueprint viewport doesn't show the camera preview.

Tools - Feb 3, 2015

Blueprint viewport doesn't show the camera preview. ...

The import option for Remove Degenerates will disable material collision checkbox

UE - Editor - Content Pipeline - Import and Export - Jan 17, 2017

When you disable the import option for Remove Degenerates the checkbox under the materials for "Enable Collision" will be disabled. This only matters if per-poly collision is being used for the mesh ...

Default values of map variable with instance editable set to true cannot be changed for instances in the level

UE - Gameplay - Blueprint - Feb 6, 2018

It appears that the information contained in a map variable that is been marked as instanced editable can not have the information changed from the default values. An instance who values have been c ...

Invalidation box appears inconsistent when using child widgets

UE - Editor - UI Systems - Jun 21, 2018

Invalidation box appears to be inconstant when using a child widget that has been added via the user created section. A child widget that modifies itself will not update when placed inside of an inv ...

Adding a call to the parent function when executing an inherited multicast event on a client results in the events being called on the client twice

UE - Gameplay - Blueprint - Apr 2, 2019

A user has reported that adding a Parent call to an inherited multicast function causes the event to be called twice if it is executed on a client. Regression?: No This occurred in 4.20 Link to te ...

Mobile HQ reflection option does not use the sky reflection cubemap.

UE - Platform - Mobile - Mar 28, 2018

See attached image., the selected sphere is using HQ reflections. HQ reflection code does not look for sky captures. Note that the sky capture does not require the parallax correction code. ...

Unable to Select Item from list in blueprints under certain conditions

UE - Editor - UI Systems - Slate - Feb 25, 2020

[Image Removed]  This happens with not only enums, but any combo box. Another example is the "Create Event" where you can select a matching function. This is a problem with how this slate widget ...

Motion blur does not work with ray traced translucency enabled

UE - Graphics Features - Lumen - Jun 1, 2021

heterogeneous volumes SkyLight VolScatter Intensity not working

UE - Niagara - Rendering - Jul 23, 2025

Heterogeneous Volumes do not respect the Volumetric Scattering Intensity values when running with Lumen, but do (correctly) when rendering with the Path Tracer. ...