Duplicated Parameters in a MPC cannot be used always return source results

UE - Rendering Architecture - Materials - Jun 15, 2015

When you duplicate a Parameter in a Material Parameter Collection instead of adding a new Parameter, the duplicated parameter always returns the same results as the source no matter the value entere ...

Struct Default Values not registering in user generated structs

UE - Gameplay - Blueprint - Jun 15, 2016

Arrays of structs do not register default values when the array is resized. Regression (no) issue (does) occur in 4.11.2 ...

Root component doesn't scale appropriately when defer spawning in C++

UE - Gameplay - Components - Feb 12, 2018

Whenever defer spawning is used from the GameplayStatics library it is supposed change it's transform properties based on what is passed in as a parameter. Despite this, it seems the newly created a ...

Some debug modes do not work in PIE

UE - Platform - Mobile - Jan 9, 2024

It looks like the output of the debug pass is ignored, and the final output from the last frame before the pass was enabled is displayed instead. If the pass is modified to return a different textu ...

Stacked Material Nodes become difficult to read

UE - Rendering Architecture - Materials - May 13, 2015

Material Nodes, particularly Constant Vector 3s and Texture Samples, become difficult to read when users overlay them like stacked cards. [Image Removed] Also reproduced in Main Promotable-CL-2548 ...

Is Playing can return false on Sequence's second playthrough

UE - Anim - Sequencer - Apr 12, 2021

Playing a sequence more than once will have an incorrect player status on the first frame.  ...

AttachChildren on the client can lose entries

UE - Gameplay - Jan 26, 2016

If a client attaches a scene component to a server authoritative scene component and that server component later has a change in attachment made on the server, the AttachChildren array on the client ...

Refraction breaks Translucent Sort Order without Separate Transparency Enabled

UE - Graphics Features - Jan 6, 2016

With multiple Translucent Material sorted in 3-D space or via Transparency Sort Priority, if one of the materials uses refraction it will render on top of the others no matter position or sort prior ...

Server crashes when client connects after Server has reloaded a sublevel with a deleted actor

UE - Networking - Jul 13, 2017

UNetDriver::DestroyedStartupOrDormantActors maintains a list of deleted startup (and dormant) actors. This is used to notify clients that have joined the server of Actors that need to be destroyed ...

Vector Field Initial Rotation will always have the same initial rotations for each emitter instance

UE - Niagara - Nov 11, 2019

The Vector Field Initial rotation module will have the same rotation for all instances of the same emitter. This is a regression from 4.22. ...