Unreal Engine Issues

SkyLight Leaking does not affect reflections when the SkyLight is static but static lighting is disallowed

Reflections do not receive SkyLight leakage contribution from a static SkyLight when static lighting is disallowed. This is caused by the function UpdateSkyIrradianceGpuBuffer checking if the SkyLig ...

Collision on rolling ball template floor incorrectly affects player character

In the rolling ball template, the new floor meshes cause the player character to jump when the player has not pressed any jump commands. It occurs more often if the players movement has been increas ...

r.Shadow.RadiusThreshold and r.Shadow.FadeResolution not affected by Scalability Settings

r.Shadow.FadeResolution and r.Shadow.RadiusThreshold values in DefaultScalability.ini are not being applied ...

Unable to save blueprint after Hot Reload that affects the class the blueprint is based on

After hot reloading a project, if the class a blueprint is based off of was edited, the blueprint is unable to be saved due to being referenced in Engine/Transient. Project for Repro: [Link Removed ...

Can Ever Affect Navigation does not detect updates to collision settings at runtime

When a mesh has its collision updated during runtime the navigation around the mesh does not update. Workaround: If the mesh is set to simulate physics then updates to its collision will update nav ...

Subsurface shading model is broken when ray traced shadows are used in 5.1+

Reflection Capture primitive invalidation in 5.3.1 causes massive hitches.

SpeedTree static meshes corrupted converting project from 4.12 to 4.14

Speedtrees are just normal static meshes once they are in the engine, so if we are corrupting them across an engine upgrade that is really bad. ...

When moving actors to the current level, their label is reset and displayed incorrectly on the Scene Outliner until the next time it is refreshed

This is a regression, it worked correctly up to UE 5.4, but repros on UE 5.5 and 5.6. Also, this seems related to [Link Removed], which was fixed by CL 40649716/40649749 and integrated into UE 5.6, ...

Issue with Landscape Layer Blending Node compile in UE 5.4.2

When the SetMaterialAttributes Material Expression is used without an input to MaterialAttributes, it will cause Landscape Layer Blend expressions to fail to compile if it is the only layer on a par ...