Unreal Engine Issues

Assert in MoviewPipelinePIEExecutor when cancelling movie scenes during rendering

When rendering a single Level Sequence with MRQ, removing the Level Sequence that is actively rendering will create an array out of bounds exception. Also confirmed in //UE5/Main, CL: 36086643 ...

Creating an HLOD with a FallbackMesh that has a section with triangles=0 will incorrectly set the UVs of the StaticMesh

The UVs in HLOD's StaticMesh appear to be broken when there are sections with zero triangles in the fallback mesh. This is most likely the case for sections containing only small parts. Workaroun ...

OnlineServices-Lobbies: Crash when host migration message is received and the next host has already left the session

A crash occurs at FindChecked in the code below.if (PreparedServiceChanges->OwnerAccountId) { InternalPublicData->OwnerAccountId = *PreparedServiceChanges->OwnerAccountId; if (bDispatchNot ...

Unreal Editor 5.4.4 crash when reproducing a LevelSequence in loop while PIE.

A crash inside Unreal Engine Editor version 5.4.4 occurs when reproducing a Level Sequence while in PIE. This issue is a regression. It only crashes in version 5.4.4. It was working correctly in ver ...

Anim Composite root motion preview is broken

LoopAndReset preview option is broken after one loop for anim composites ...

Volume material doesn't support EyeAdaptation node

PrimitiveSceneProxy CreateSceneProxy override not working in 5.4

Overriding CreateSceneProxy function from PrimitiveSceneProxy for a custom class no longer renders in 5.4 even though the same code is working in 5.3. ...

Nanite meshes are lit differently in Actor Colorization view modes than non-Nanite meshes

When the Lit > Actor Coloration > Affects Navmesh or other Actor Coloration mode is used, Nanite meshes apply lighting differently than non-Nanite meshes which can make it difficult to use the Actor ...

Regression: "Object Position" node in Light Function materials did not compile up to UE 5.0. Starting with 5.1, it compiles but outputs garbage values

Up to UE 5.0, when the "Object Position" node is used in the Material Editor as part of a material with Light Function domain, attempting to compile the material results in the following error: "[SM ...

Skylight Intensity causes brightness discrepancy between the pathtracer and realtime renderers

In a scene without a sky sphere, increasing the skylight intensity will cause the sky to brighten in the pathtracer. Other renderers do not brighten the sky, and the intensity increase is applied on ...