Unreal Engine Issues
Unreal Engine Issues
Packaging failed with disabled plugin
UE - Foundation - Cpp Tools - Oct 9, 2018Disabling any plugin causes packaging failure. No repro in 4.19 Also occurring when Disabling all platforms except for windows and changing configuration from development to shipping. ...
Scrollbox under multiple retainerboxes doesn’t scroll correctly with PIE
UE - Editor - UI Systems - Aug 14, 2019When the scrollbox as the child of multiple retainerboxes, the scroll isn't smoothing. It can see issue with PIE only. If it run with standalone (or package build) is fine. In SScrollBar::ExecuteO ...
PIE window does not match what was set in the New Viewport Resolution setting
Tools - Oct 24, 2019Setting the resolution of PIE to 4K Ultra HD results in the new PIE window going very far out of the bounds of 4K. If you are using two monitors the PIE window will bleed over a good bit into the ot ...
Painted Vertex colors are not retained when using "Convert Selection to Blueprint Class" in Child Actor mode
UE - Gameplay - Blueprint - Aug 25, 2020From the User Submission: I spent some time poking through the FComponentInstanceDataCache code and noticed that there is no component instance data saved/applied for'native' component types, so si ...
Ensure when closing PIE during Level Sequence playback with spawnables in a streamed level
UE - Anim - Sequencer - Nov 16, 2020When a spawnable is spawned in a streamed level, exiting PIE will cause an ensure, because the world is not valid on the actor. ...
Crash when cooking landscape collision in world partitioned level
UE - Graphics Tools - Terrain - Landscape - Jun 24, 2022This is caused by the loss of data in the ULScapeHeightfieldCollisionComponent::CollisionHeightData. The CollisionHeightData is not marked as BULKDATA_PayloadInSeperateFile and is processed with a k ...
Substrate- black outline appears when using sharp contrast mask to blend slabs
UE - Graphics Features - Oct 4, 2024Substrate materials have a thin border of black pixels between slabs. These lines can be made more apparent by changing the Diffuse Albedo color of the two slabs to pure white. This will remove the ...
Translucency Volume are not correctly shadowed in 5.5 without Virtual Shadow Maps and are not light correctly by some lights
UE - Graphics Features - Dec 20, 2024TranslucencyVolume spheres are not correctly shadowed nor lit in Unreal 5.5 with VSMs disabled. Unreal 5.4 does correctly shade the sphere without VSMs. There appears to be differences in the outpu ...
Farfield shadow in lumen scene
UE - Graphics Features - Jul 21, 2025Shadows in the Lumen Scene from Lumen's Direct Lighting do not match the world when in the Lumen Far Field. This leads to shadows where there should not be any, and missing shadows where there shou ...
After compile, spawnable actor is stuck in spawned state
UE - Anim - Sequencer - Jun 3, 2016After compile, spawnable actor is stuck in spawned state ...