Unreal Engine Issues

Cascade ParticleRelativeTime Outputs Constant 0 on Mobile

Cascade ParticleRelativeTime outputs constant 0 on mobile. Found in 4.19 CL# 4033788, 4.20 CL# 4302132, 4.21 CL# 4321618 ...

Severe ghosting on animated objects when camera stops moving in sequences when using path tracer

Pixels seem to stop updating in the path tracer when a camera stops moving in sequence. Old color values from objects that have moved seem to still affect pixels they should not.  ...

Geometry Collection behavior does not change when changed by BP

Reproduced 6/6 times. This seems to affect all "Set" functions for Geometry Collection Components, such as Setting Object Type from Static to Dynamic, or changing Collision Type. ...

Cooking fails with a Nanite Landscape and 3D text asset

Adding a 3D text actor to a level with a Nanite landscape causes cooker to hit an assert Tested in the Following  //UE5-Release-5.3-CL-27405482 ...

GPU particles disabled on Quest

GPU particles were disabled on Quest 1 due to a compute issue. We need to validate / fix issues for Quest 2 / Quest 3. Reported in [Link Removed] ...

Poor Vulkan RHIThread performance in Development builds on some Android

Community-attempted workaround received in [Link Removed] Correct fix submitted to 5.6 FNMain in [Link Removed] which needs integrating into 5.5.3. ...

Crash upon opening Windows 64 bit development build with only DX10 RHI enabled

When packaging with only support for DirectX10 RHI, the editor will crash after hitting "OK" on the window that mentions that the Global Shader Cache file is missing. This was encountered while run ...

Custom animation node in game module fails to load in -game or packaged project

Not sure if this is an Animation or a Core issue, but a runtime Anim Node will not load properly with "-game" or in a packaged build. The developer that made this sample read this blog post: [Link ...

[Crash]-[Reimport] - Crash on reimporting CAD file with deleted light sources

Chaos Cloth - Visualization materials cause async load flush and slows down starting a PIE session.

The loading of the cloth visualization materials disturbs async loads shortly after starting PIE which causes an async flush and several seconds stall. The solution would be to move these to a sing ...