Unreal Engine Issues
Unreal Engine Issues
The vertex color becomes red when importing a static mesh without Color Set
Tools - Aug 28, 2018It seemed to be white at 4.19, but it seems to be red at 4.20. I found out that there seems to be a cause for initialization of Mesh Attributes. As a result of fixing this, it is now displayed in wh ...
(Regression) Risk of PostLoad() assert crash in all cooked, nativized builds with async load thread enabled.
UE - Gameplay - Blueprint - Oct 25, 2018This is a regression that was introduced by the fix for [Link Removed]. As a result, we can potentially hit an assert in a cooked, nativized build during async load of a non-nativized Blueprint CDO ...
Niagara GPU particles will always have a lifetime of one second if they use a Collision Module
UE - Niagara - May 2, 2019GPU Particles will always have a lifetime of one second when using a collision module. This is a result of an issue with how off screen timing is handled. GPU particles that are off screen should on ...
Niagara Crash : ExportParticleDataToBlueprint module causes buffer overrun
UE - Niagara - Aug 10, 2021This buffer overrun is probably caused by the ExportParticleDataToBlueprint module does not respecting the GPUAllocation Fixed Size setting in the module. In fact, out-of-range export data is not c ...
Marketplace plugins "missing precompiled manifest" on Mac
UE - Platform - Apple - Oct 12, 2021Summary This issue was reported by a licensee via UDN. It appears that all of the plugins generate a "missing precompiled manifest" error when packaging a project on Mac in UE4.26.2.Licensee Platfor ...
Atmosphere related scan line artifacts for Path Tracer with MGPU
UE - Graphics Features - Path Tracer - Feb 10, 2023There are two UDNs related to this issue. It makes the Path Tracer unusable with MGPU, with atmosphere enabled. I already have a one-line fix implemented and tested. The atmosphere scan line arti ...
Ensure in GatherSubobjectData
UE - Gameplay - Nov 27, 2023An ensure in GatherSubobjectData is being hit under certain inheritance conditions. This appears to be similar and potentially related to [Link Removed] and the fix at CL 16377852. Stepping through ...
Serialized Blueprints containing MIDs do not load correctly in packages.
UE - Rendering Architecture - Materials - May 8, 2024This issue is an easy fix but raises a different problem which is likely ingrained in UE, which is that MIDs should not be serialized out and should always be transient. Unfortunately we are in a po ...
MakeArray wildcard node gives a compilation error when being used in a Blueprint Macro.
UE - Framework - Blueprint - Dec 19, 2024There is an error with the SmartMacroInterface, where you can't use an empty wildcard "Make Array" node. This error makes the blueprint not compile and the macro unusable. Disabling the bUseSimpleWi ...
Editor Crashes when enabling Vertex Colors on an imported Skeletal Mesh with Morph Target Animations
UE - Graphics Features - Oct 11, 2018Licensee wants to be able to import skeletal meshes which have Vertex Colours (their entire game is Vertex Coloured) and Morph Target animation, but they're seeing a crash when toggling Vertex Color ...