Popping Ribbon UVs

UE - Niagara - Mar 10, 2025

Please see the Additional Link for related UDN information. The UV popping described can be subtle, depending on settings; it's affected by spawn rate and GPU vs CPU. The popping shown in the gif t ...

Starting position of physics simulated bp is different in Standalone Game

UE - Simulation - Physics - Feb 26, 2016

Starting position of physics simulated bp is different in Standalone Game User Description: Things work fine in the editor window, but when I run a standalone game then blueprints with physics bod ...

Animation Modifiers that contain a null Animation Sequence value cause the Engine to crash when applied to an Animation Sequence

OLD - Anim - Nov 14, 2018

When an Animation Modifier passes a null Animation Sequence value to an Animation Sequence the Editor will crash. This is a regression from 4.20.3 (CL-4369336). This was reported and tested in 4.21 ...

When printing an option within an Enumeration out to the screen it does not return the correct name in stand alone

UE - Gameplay - Blueprint - May 19, 2015

If a user tries to print out one of the named variables that is stored within an Enumeration blueprint then it will return something along the lines of Enumeration 0, Enumeration 1, Enumeration 2, . ...

Font Differences

UE - Editor - UI Systems - Slate - Jun 25, 2015

There are some rather large differences between Freetype and Photoshop's rendering of the Fira font. You need to set your image in Photoshop to be 96 DPI. The newer version of Freetype appears to ...

UMG widgets with instanced properties reset those properties to default on compilation

UE - Editor - UI Systems - Feb 2, 2016

This is perhaps a misuse of Instanced properties but the repro info is good so I thought I'd better add it to Jira. See Additional Info URL for details. Checked and happening on: //UE4/Main CL-2884 ...

Editor primitives render incorrectly in stereoscopic with instanced stereo

UE - Platform - XR - Aug 17, 2016

Trigger box icons move around when oculus head movement is used. Found in //UE4/Release-Staging-4.13 @ 3090357 QA-Promotion map Edit: 08-22: This affects volumes as well as their editor icons, upd ...

Using FEditorModeID for the "Mode" console command does not switch the modes tab

Tools - May 10, 2016

Using the FEditorModeID for the different editor modes does not affect actual modes available in editor Modes tab. Example: Command "Mode EM_Foliage" does not switch to the foliage mode Workaround ...

Animation Interpolation will not occur if the Evaluation Rate is set at the same value as skipped frames

OLD - Anim - Nov 18, 2016

When an animation is skipping frames, interpolation will not occur if the Max Evaluation Rate is set to the same number as the number of frames being skipped (or 1 frame higher). The Eval Rate will ...

Impure Cast Nodes Can be Converted to Pure While the Blueprint Graph is Read-Only

UE - Gameplay - Blueprint - Dec 1, 2016

Cast nodes can be converted to pure while the blueprint graph is in read-only mode, such as when you are debugging the blueprint. Found in 4.14.0 CL# 3195953. Reproduced in 4.13.2 CL# 3172292 and 4 ...