Unreal Engine Issues

nDisplay - Editor crash when clicking on actors in the ICVFX Panel viewport

Crash during package save due to the async text mesh build in Text3D

Saving a package in the editor while there is a queued text mesh build will cause a fatal error because the build will execute during the save, and creating objects while saving is not allowed. This ...

Material Instance used textures list shows sample textures used as Input Preview Textures within Material Functions

Nanite Meshes with WPO exhibit TSR smearing with Velocity Write during Depth Pass, regardless of Mobility

I set up a test project with different combinations of Nanite/Non Nanite, Movable/Static, and instance and component types, and the only case that seems to not smear at all are the non-nanite Movabl ...

WorldPosition in PostProcessMaterial returns inconsistent results in AfterTonemapping with TSR and TAA

This behavior appears to be a regression new to UE5, as I tested in 4.25 and the issue does not occur. Interestingly, the issue clears up if you switch to No, FXAA, or MSAA antialiasing methods. Th ...

Level instance in unloaded data layer stays loaded.

[Waveform Editor] - Waveform Editor has noticeable latency with larger files [investigate only for now]

I've noticed as I've been working with the Wave Form Editor, that it works fairly well for smaller files, but on longer assets there can be some pretty noticeable latency when adding and adjusting t ...

Push based fast array with net.PushModelSkipUndirtiedFastArrays not replicating across multiple PIE sessions

The conditions for this bug are fairly specific. The actor must be statically placed, with its only replicated property being the fast array, and net.PushModelSkipUndirtiedFastArrays must be enabled ...

PoseSearch::GenerateDDCKey is not deterministic between editor restarts

we need to investigate why between editor restarts the DDC key generation for the motion matching pose search databases is not deterministic, causing the assets to be rebuilt ...

ISM Component in an instanced BP does not take into account changes to NumCustomDataFloats from the BP class

PerInstanceSMCustomData is bulk serialized and doesn't get changed on the BP instance when changing NumCustomDataFloats, possibly causing out of bounds array access leading to a crash. Possible sol ...