Unreal Engine Issues

4.22.1 Crash in FVulkanResourceMultiBuffer::Lock

Vulkan Multibuffer Lock mechanism for ReadOnly does not appear to be implemented. Temporary workaround has been provided to licensee. ...

Paper2D performance regression due to TArray resizing

We've noticed after upgrading our heavy Paper2D project to 4.22 that tilemap performance has been massively degraded compared to previous versions. After some digging we found out that it's due to a ...

Fix AGameModeBase::GetGameSessionClass

AGameModeBase::GetGameSessionClass wasn't properly returning the set GameSessionClass. ...

Fixing a Blueprint's compilation error after editor reload causes instances to lose transform

Saving and reloading a Blueprint instance with a compilation error, a.k.a., "Bad Blueprint" will lead to a transform reset when the Blueprint is successfully recompiled. ...

Moving Asset back to the location where a fixed up redirector was located can remove it from source control

Pasting timeline components into another actor and then choosing "cancel" on fix self context function references results in a broken state

upd. Regression was checked on //UE4/Release-4.26 CL 15973114, issue was reproduced. Regression - No ...

Instanced meshes velocities fix

"We've been able to enable velocity rendering when using instanced rendering. However, by looking at the generated vertex shader the computation of the previous position seems to be incorrect: flo ...

Fix world to meters scale

Is changing the world to meters in the current 4.19 AR template project supposed to affect the world, or is world to meters only for VR projects currently? We have project where a client wants us to ...

Integrat PhysX crash fixes

iOS fails during build step with OSS Facebook plugin enabled due to spaces in filepath

When a user tries to package or launch onto an iOS device they will fail at the build step due to:[3/8] sh Unzipping: /Users/Shared/Epic Games/UE_4.22/Engine/Source/ThirdParty/Facebook/IOS/FacebookS ...