Unreal Engine Issues
Unreal Engine Issues
Single sided complex collision mesh collision blocks character movement from backside
UE - Simulation - Physics - Query - Nov 17, 2023Commenting out the branch in FTriangleMeshSweepVisitor::VisitSweep is a work-around.if (CullsBackFaceSweepsCode != 0) { if (VectorMaskBits(IsBackFace)) { // Don't cull the back face ...
Some instances spawned by NeagaraDataInterfaceChaosDestruction breaking event will be set location to the world origin
UE - Niagara - Data Interface - Nov 29, 2024The following code can often be found in UNiagaraDataInterfaceChaosDestruction.const int32 ParticleID = ParticleIDParam.GetAndAdvance() - LastSpawnedPointID + 1; The LastSpawnedPointID is usual ...
RootMotionModifier_SkewWarp bug
UE - Anim - Gameplay - Mar 6, 2025In /Game/ABPLinkingShowcase/Blueprints/Pawn_ABPLinkingCharacter: The character mesh’s root location is lower than the capsule’s lowest point. This is what causes the issue. Based on the event graph, ...
Bindless Virtual Textures are sampled with non-virtual samplers
UE - Rendering - Architecture - Materials - Nov 28, 2024Texture Collections can contain virtual textures. There is no way to inform TextureObjectFromCollection that the texture is virtual, only that it is a Texture2D. This texture object is then sampled ...
Crash occurs when right-clicking in graph of a blueprint with a null parent class
UE - Gameplay - Blueprint - Mar 17, 2017REGRESSION No Crash occurs when the user right-clicks in the graph in a blueprint that has a Null parent class. ...
Crash in FBlueprintActionMenuBuilder while editing blueprints
UE - Gameplay - Blueprint Editor - Apr 28, 2017Note those are not 100% repro steps they are what I remember doing. I've got this issue twice so far and both times I was editing a blueprint and switching between constructions script and event gr ...
Scroll Bars for Certain Editor Windows are Reversed when using Trackpad on Mac
UE - Platform - Apple - Mar 25, 2015Certain scroll bars within the Editor while on a Mac have their directions reversed. i.e. The 'World Outliner', the 'Details' panel within a 'Blueprint.' The suggested workaround I gave to the user ...
UV Layout Changes on export from Engine to Maya and Max
UE - Editor - Content Pipeline - Import and Export - Jan 19, 2015The UV layout of a Mesh is altered slightly when exported from the engine. It becomes more noticeable on objects as their UV Islands shrink in size. Given a default full 0-1 unwrap it looks like t ...
CameraVectorWS Input Data as Post Process Blendable not Rendering Correctly
UE - Graphics Features - Apr 6, 2016When calling a post process blendable to the screen using the CameraVectorWS input data, only the geometry is effected and not the screen space. Note I sent an email out about this issue, and it ha ...
UMG Background Blur renders black on Android
UE - Platform - Mobile - Dec 8, 2016Tested on Nexus 6P with Android 7.0 Suggest that on mobile the background is not rendered in real time, instead we render the blurred image for one frame and use that same image for subsequent fr ...