Unreal Engine Issues
Unreal Engine Issues
Foliage Painted on BSP is Deleted after Building Geometry
UE - World Creation - Worldbuilding Tools - Foliage - Dec 15, 2014After painting foliage meshes on a BSP surface and rebuilding the level (more specifically the geometry), the meshes are deleted. This bug is especially nasty because you cannot Ctrl+Z after buildi ...
All animation are reasmpled to be 30FPS regardless how much framerate the original one is
animation resampling should not work by default ...
Flickering windows with four player PIE on Laptop Geforce cards
UE - Graphics Features - Oct 1, 2015Flickering windows with four player PIE on Laptop (mobile) Geforce cards. See attached video, or video link from the answerhub thread. It happens repeatedly and very frequently. ...
Sample game headers aren't set up in an extensible way
Docs - Samples - Mar 30, 2015Our sample games all seem to use the semi-deprecated Classes folder for their headers, and many of these headers omit a #pragma once (or other header guard). This means that they don't play nicely ...
Flickering Meshes after removing HISM instances
UE - Graphics Features - Aug 2, 2018Removing HISMs in a packaged project causes meshes to remain and flicker in a packaged project. (Inclusive Nativization is enabled in test project, but issue occurs with nativization disabled as we ...
Crash when changing parent of Material Instance with Layered Materials and viewing Layer Parameters
UE - Rendering Architecture - Materials - Aug 1, 2025Reparenting a MaterialInstance that uses Material Layers to another instance with a different layer configuration can cause the editor to crash when opening the Layer Parameters tab. This appears to ...
Skeletons don't cook in a deterministic way
OLD - Anim - May 11, 2017The "Rifle_Skeleton" asset in ShooterGame doesn't cook deterministically, and as such is always included in patches. Possible regression of [Link Removed] ...
Pasting a material graph breaks connection to any material function nodes.
UE - Rendering Architecture - Materials - Dec 4, 2019Pasting a material graph breaks connection to any material function nodes. ...
Flickering shadows/GI when DrawMaterialToRenderTarget is called per tick in PIE
UE - Rendering Architecture - Jul 11, 2024When DrawMaterialToRenderTarget function is called on tick and actors are spawned in game, the lumen shadow/GI visually flickers. Debugging shows that the lumen screen probes are flickering as well. ...
GPU particles are not showing on Metal / iOS
UE - Graphics Features - Feb 27, 2015If you place a GPU particle into your project and deploy to an iOS device that supports metal, the asset will not show correctly on the device. I have attached the assets that were used to this rep ...