Unreal Engine Issues
Unreal Engine Issues
Nanite Mesh Dither Opacity Mask Not Working in 5.6.0
UE - Graphics Features - Nanite - Jul 30, 2025In Unreal Engine 5.5.4, the Dither Opacity Mask option in a Masked material works correctly on Nanite meshes. However, in version 5.6.0, the dithering effect no longer applies to Nanite meshes. ...
UStaticMeshComponent.PreviousLODLevel always returns 0
UE - Graphics Features - Aug 30, 2017The UStaticMeshComponent.PreviousLODLevel variable always returns 0 no matter what the last LOD actually was. Regression?: No This also occurred in 4.16 ...
ObjectScale returns a Cascade Mesh particle's XYZ scale as 1.0
UE - Niagara - May 13, 2020Sampling a Cascade Mesh Particle's scale always returns XYZ as 1.0 This is a regression from UE4/Release-4.24. This does NOT affect Niagara Mesh particles. I've attached a Cascade (left example ...
Clothing Backstops are Larger than the Clothing Asset When Asset is Imported at a Scale Other than 1.0
UE - Simulation - Physics - Character - Feb 1, 2018Backstops show up to be larger than the clothing asset when an asset is imported at a scale other than 1.0 and a clothing assets is created and applied Inconsistent in 4.18 but consistent in 4.19 ...
Apple TV offline saves fix
UE - Platform - Mobile - Jul 31, 2019Offline save games don't work on Apple TV, (in fact all file operations fail) because Apple has decided that you can't store anything in the NSDocumentDirectory anymore. The fix is to replace occurr ...
"ShowFlag.InstancedFoliage 0" hides HISMC
UE - World Creation - Worldbuilding Tools - Foliage - Jul 29, 2020Hierarchical Instanced Static Mesh components that contain no foliage are disappearing when ShowFlag.InstancedFoliage 0 is used. This was reported and tested in 4.24.3 (CL-11590370) and reproduced ...
Fix rarely leaking Particle System Components
UE - Graphics Features - Jul 22, 2015User has found an issue in which Anim Notifies, spawning particle system components that cannot ever render will leak the particle system component. The user has a working fix but it's likely not i ...
Oculus mirror window goes black when headset removed for any mirroring mode besides 0
UE - Platform - XR - Nov 16, 2016If using any hmd mirroring mode besides 0 on Oculus, when the headset is removed, the mirroring window goes black in a packaged build, or in -game, for example: UE4Editor.exe VrTemplate4x15 MotionCo ...
Frame rate issues using Fixed Frame Rate and Matinee
Tools - Aug 10, 2016Frame rate issues using Fixed Frame Rate and Matinee. This could be similar to some issues involving "Force Fixed Frame Rate". ...
Float Curve evaluation may yield completely wrong results due to floating-point precision issue
UE - Anim - Runtime - Oct 31, 2024Note: This is possibly related to [Link Removed]. For some inputs, function UE::Curves::WeightedEvalForTwoKeys() inside file "CurveEvaluation.cpp" can incorrectly return the value of the first key, ...