Using Fixed Frame Rate Increases the Speed of Auto Save

UE - Foundation - Core - Oct 26, 2015

Using a lower fixed frame rate (i.e. 20fps) causes the auto save timer (when set to the default of 10) to count down in 3 seconds. Found in 4.10 Preview 2 CL 2733139. Reproduced in 4.9.2 binary an ...

Crash on loading pre-4.20 cloth data when compute skin cache is enabled in 4.21

UE - Graphics Features - Mar 19, 2019

According to information from the licensee, the else clause was added to "FSkeletalMeshLODModel::(GetClothMappingData()" at CL 4437969 , but if it is the cloth data existing from 4.20 or earlier, it ...

When a fixed delta time step of 0.02 or higher is used with some skeletal mesh objects, rotational forces applied using AddTorque have no affect on the skeletal mesh.

UE - Simulation - Physics - Jan 27, 2015

Using AddTorque to apply a rotation to a skeletal mesh does not always provide the expected results if a fixed time step is being used. When doing this to the Owen character in the Content Examples ...

PublicIncludePaths array in a 4.20 plugin looks for the include path in relation to the Engine instead of the plugin

UE - Foundation - Cpp Tools - UnrealBuildTool - Jul 23, 2018

A plugin created in 4.19 automatically includes an entry for the plugin's Public directory in the PublicIncludePaths array in the Plugin.Build.cs file. Plugins created in 4.20 no longer automaticall ...

Fix delegate problems with Blueprints

UE - Foundation - Core - Feb 18, 2015

https://udn.unrealengine.com/questions/236428/bug-blueprints-executing-zombie-code.html Blueprint MyCharacter is based on native class CodeFirstPersonCharacter. CodeFirstPersonCharacter has compone ...

Fixing Issue in Niagara stack across particle and system stages crashes the editor.

UE - Niagara - Jan 18, 2024

The Update Persistent Audio module has a dependency on a Play Persistent Audio module. When there are two modules in different overview nodes, the automatic fix up can put the Play Persistent Audio ...

Nav Area class is reset after updating from 4.19.2 to 4.20 Preview 3

UE - AI - Jun 21, 2018

When upgrading a 4.19.2 project to 4.20 Preview 3 the Nav Area Class is changed to None instead of the value it was before the upgrade. Upgrading from 4.18.3 to 4.19.2 works as expected. This was t ...

With Use Fixed Frame Rate turned on, time-based elements of the Editor appear to operate at incorrect rates.

Tools - Oct 29, 2015

Turning on the Use Fixed Frame Rate option for a project causes time-based elements of the Editor to operate at incorrect rates. ...

Crash editor when open the level sequencer after updated 4.20

UE - Anim - Sequencer - Jan 8, 2019

When migrating from the version before 4.20 to the version after 4.20, opening the level sequencer will crash. I think that there is a problem with conversion from SnapTimeInterval (FixedFrameInterv ...

T.MaxFPS not restored when exiting PIE while Fixed Frame Interval Playback is enabled

UE - Anim - Sequencer - Jun 12, 2017

T.MaxFPS not restored when exiting PIE while Fixed Frame Interval Playback is enabled Regression: YES Directly related to CL:3365017, it would seem. Broken: 4.16 Worked: 4.15 ...