Crashes when attempting to use an Instanced Struct inside Control Rig / Rig VM

UE - Anim - Rigging - Control Rig - Mar 17, 2025

Currently, the Control Rig Editor allows the user to use the "Instanced Struct" type, for example for a variable or function input/output. However, this type does not seem to be properly supported ( ...

GeometryCollectionActor SetSimulatePhysics false does not stop Physics Simulation

UE - Simulation - Visual - Nov 28, 2024

If the GeometryCollectionActor (GCA) is simulating physics, calling SetSimulatePhysics(false) does not stop the simulation. If the simulation is paused, calling SetSimulatePhysics(true) does as expe ...

Niagara Fails to Compile Shader For iOS and Android

UE - Niagara - Aug 2, 2018

Niagara fails to compile shader for iOS and Android. Unable to test in 4.19 due to assets provided being created in 4.20. Found in 4.20 CL# 4233996 and 4.21 CL# 4247867 ...

Ensure and Assertion thrown while attempting to change Float value on a Sky Light using the Set Editor Property node

UE - Editor - Workflow Systems - Apr 25, 2022

This is a regression. Assertion thrown while attempting to change a Float value on a Sky Light component using the Set Editor Property node. Different property values can trigger this assertion bes ...

Slow-rendering thumbnails can be queued up for real-time updates

UE - Editor - Content Pipeline - Content Browser - Sep 22, 2016

A licensee is seeing performance drops while using the editor due to a custom thumbnail renderer taking a while to generate thumbnails while Real-Time Thumbnail rendering is enabled, and has request ...

Debug lines can be obscured by post processing effects

UE - Graphics Features - Sep 14, 2015

Debug lines (Results of DrawDebugLine()) can be obscured by post processing effects such as a strong glare. Debug lines should be always visible for debugging purposes. ...

SunTemple is washed out in one color on some Android devices.

UE - Platform - Mobile - Jan 16, 2017

This was discovered during the 4.15 mobile compat. ...

Viewport has graphical glitch while editing but not in PIE

Tools - Feb 6, 2015

User has a project that the viewport has gotten corrupted. The icons are now no longer camera facing and are facing in the positive y axis. The sun disc and sky are blurred. When PIE everything rend ...

Scene Capture 2Ds Ignore Separate Translucency Settings

UE - Graphics Features - Jun 3, 2015

When you place a Mesh with a Translucent Material using Separate Translucency in the view of a Scene Capture 2D using Gaussian DoF, the resultant capture will ignore the Separate Translucency Settin ...