Unreal Engine Issues

InstancedStaticMesh displaying corrupt lightmap data

I think I narrowed this issue down to bad UV coordinates being interpreted during the BasePassVertexShader execution applied to instancing. At this line in VertexFactoryGetInterpolantsVSToPS: flo ...

[Submix][Content Browser] - Deleting an unsaved Submix asset (any type) causes them to reappear when creating a new asset

Deleting unsaved Submix assets causes them to reappear the next time you create a new asset. Issue does not occur in 4.26, but does occur in 4.27 and 5.0. ...

Crash when adding an Event Write node to a Niagara Scratch Pad module

It seems that the crash is related to all of the "Write" events. I tested the Event ChaosDestruction Write, Event Float Write, and Event Bool Write and all 3 caused the crash, but their "Read" count ...

Chaos : Crash when destroying part of Geometry collections clustered by AnchorField

Here's a workaround void DestroyParticle(TGeometryParticleHandle<T, d>* Particle) { auto PBDRigid = Particle->CastToRigidParticle(); if(PBDRigid) { RemoveFromMapAndArray(PBDRigid, Ac ...

AllowCommandletRendering D3D12 device crash

Actor components added natively can be set to null on derived blueprints during blueprint compilation

A native default subobject can be nulled out during compilation of the owning class in derived Blueprints with circular dependencies.  ...

Improve BSP Face Selection Behavior

Modifying BSP brushes from their original shape sometimes makes it hard to select certain some faces; clicking on various points on the face, modifying the camera or toggling translucent selection a ...

IOS Preview on MacOS crashed when open postprocess material that uses stencil

IOS Preview on MacOS crashed when open postprocess material that uses stencil ...

Path generated in wrong location from mesh in hidden sublevel

Editor freezes when force deleting a level created with Conversion Suffix

Once force delete is initiated, editor was still non-responsive ~10 minutes later and had to be closed from Task Manager. Upon reopening the project, the level is still present in Content Browser an ...