A function in a Blueprint Function Library that references another function in that library cannot be saved after closing and reopening the project

UE - Gameplay - Blueprint - Mar 1, 2015

A function in a Blueprint Function Library that references another function in that library cannot be saved after closing and reopening the project. The library will save without error until the pro ...

Skybox Textures Have a Seam When Using a Cube With Inverted Normals

UE - Graphics Features - Feb 14, 2020

Skybox textures can have a seam when using an inverted cube for a sky. Attached is an example 4.24.2 project. Note: One of the attached seam screenshots is hard to see unless you expand it. Found ...

Editor Crashes When Setting Location of Scene Component BP to World

UE - Gameplay - Blueprint - Dec 9, 2015

In an actor blueprint with a scene component blueprint as its root, if you add a child object to the scene component blueprint, and then go into the scene component blueprint and set the location to ...

CPU Collision is being offset on Z

UE - Graphics Features - Sep 29, 2014

DESCRIPTION: Collision's on CPU Particles are incorrectly being offset on Z by several units [Link Removed]https://answers.unrealengine.com/questions/105202/mesh-particle-collision-bug.html EDIT: ...

CreateWidget node keeps reference to created widget on output pin

UE - Gameplay - Blueprint - Oct 17, 2017

There was an issue in 4.16 (fixed in CL# 3437205) in which blueprint output pins would hold on to object references until the blueprint was destroyed. It appears that an additional fix may need to b ...

Light shaft bloom produces heavy flickering when offscreen

UE - Graphics Features - Dec 18, 2019

See attached video. Happens always in editor, will also happen in standalone game but only if viewport rect has not the full window size. The issue was not present in 4.22. Update 1/22/20:  A ...

Cable Actor becoming stiff when bound to two dynamic objects

UE - Runtime - Simulation - Jun 1, 2023

the cable actor does not dynamically deform when the cable actor's parent mesh moves. Instead, the cable actor becomes rigid between the meshes it's bound between. This bug does not occur in the fo ...

Assertion failed: Engine crushes when a geometry collection hits a landscape

UE - Simulation - Physics - Jul 27, 2020

This is because THeightField::PhiWithNormal has not been implemented yet. ...

Long thin spinning objects take too long to stop spinning

UE - Runtime - Simulation - Jun 5, 2023

See the SpinningObjectStability test map in the Physics Sandbox. [Link Removed] It's not clear if this is a bug or a side effect of some of our solver shortcuts (e.g., omission of the precession te ...

When importing multiple meshes at once and change the Uniform Scale meshes import at different sizes

UE - Editor - Content Pipeline - Import and Export - Sep 21, 2017

When a large quantity (about 50 in this case) are imported simultaneously, and the Import Uniform Scale is changed to any other number besides 1, random meshes differ in size. This happens regardles ...