Unreal Engine Issues
Unreal Engine Issues
"Primitives with unbuilt interactions" not clearing after lighting scene rebuild
UE - Graphics Features - Oct 29, 2021Regression No, according to affect version 4.26 and 4.27 [2021.10.29-17.01.06:085][830]Primitives with unbuilt interactions: 6[2021.10.29-17.01.06:085][830] Primitive FoliageInstancedStaticMeshComp ...
Standalone Material Function Instance creation results in crash
UE - Rendering - Architecture - Materials - Mar 2, 2023Coming from UDN https://udn.unrealengine.com/s/case/5004z00001mDBzzAAG/material-instance-asset-creation-workflows?fromCase=1 Either standalone MFI creation should work just like MaterialInstances, ...
Sound Attenuation settings do not function when Allow Spatialization is False
UE - Audio - Spatialization - Aug 3, 2023Override Sound Attenuation setting does not work, Sound will play at max volume regardless of distance between source and observer. ...
Add BP function that returns the list of DataLayerInstances in the DataLayerManager
UE - World Creation - Worldbuilding Tools - World Partition - Oct 3, 2023A licensee doesn't have access to all DataLayerInstances of the DL Manager via Blueprint. [Link Removed] ...
Hair Shadows Not Affecting SSS Back Scattering (Subsurface Profile)
UE - Rendering - Graphics Features - Mar 30, 2026Groom strands do not appear to correctly block transmitted light for Subsurface Scattering Profile Materials. In some cases, not only will they not block the light, but can instead lead to more ligh ...
Swarm Agent Binaries Missing in Launcher 5.7 Preview
UE - Foundation - Build - Rocket (Installed Engine) - Oct 23, 2025The Swarm binaries are missing from Engine\Binaries\DotNET in the 5.7 Preview launcher version of the engine. This causes any lighting build or precomputed static visibility builds to fails due to t ...
Nanite meshes are lit differently in Actor Colorization view modes than non-Nanite meshes
UE - Graphics Features - Nanite - Aug 28, 2024When 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 ...
Blueprint Actor cannot delete implemented interface when Interface is converted to an Event.
UE - Gameplay - Blueprint - Dec 11, 2019In Editor, When you remove a return value parameter from a Blueprint Interface function's Output Category. (so there are no return values), it becomes an event. In any Blueprint that implements the ...
DrawMaterial() Function not Rendering Transparency when using Dynamic Material Instances
UE - Graphics Features - Oct 1, 2015When using a Dynamic Material Instance feeding into a Draw Material in a HUD Blueprint Class, Translucent Materials will not render. This looks to be a special instance case of [Link Removed]. ...
console "stat" commands function properly but report command as not recognized
Tools - Jan 9, 2015A number of "stat commands" such as "stat memory" or "stat collision" are working when used but display the message "Command not recognized: stat memory" when entered. ...