Unreal Engine Issues

Crash using D3D raytracing with Support Ray Tracing unchecked static mesh

Static mesh that does not have Support Ray Tracing flag does not have a GeometryRHI object. So it causes a crash in FD3D12RayTracingScene. Excluding instances that do not have a GerometyRHI in FDef ...

Crash occurs when renaming an asset that is used by Class Default Object

Not a regression. Tested in: //UE4/Release-4.26.2 CL15973114 Binary - Reproduced //UE4/Release-4.27.1 CL17735300 Binary - Reproduced //UE5/Release-5.0-EarlyAccess CL16682836 Binary - Reproduced Fro ...

Enabling windows animation causes dropdowns to glitch up and down.

Observe dropdowns glitching up and down when enabling Windows Animation in editor preferences.  This is not a regression due to it occurring in 4.26.2 ...

Typo in water body ocean materials parameter

In Water_Material_Ocean material, there is a typo under FluidSimulation that says "Siulation Flowmap Speed" This is not a regression due to it occurring in 4.26.2. ...

The VertexInterpolator connected to a Normalize node, input into BaseColor results in black Mesh LOD Coloration

It does not appear to matter to the repro steps what is input to the VertexInterpolator, it matters more that there is a Normalize between the VertexInterpolator and the base color input of the mate ...

Crash when changing the Codec in a curve compression setting

The crash will occur when changing the Codec in a curve compression setting. This is a regression do it not happening in 4.26.2.. ...

Key input by Sequencer is missing in FBX output of parent-child actors

This problem did not occur in 4.27.0. Animation is not output when outputting a hierarchical structure. Actor(A) 　　┗Actor(B) 　　　　┗Actor(C) This is how the attachments are registered, and the ke ...

Sequencer : Attaching a Possessable to multiple Spawnables across multiple cuts causes incorrect location restoration

Regression No, according to affects versions 4.27 and 4.27.1 The restore process proceeds in the following order : 1. Remove spawnable actor in first cut (no effect because the actor is already r ...

GPU Particle may blink when rendered in scene capture.

Reimporting an FBX causes invalid collision on Spline Mesh Components (PhysX)

Reported in UDN: [Link Removed] Reimporting a static mesh asset from an FBX file causes collision to disappear on spline meshes referencing the static mesh asset. In investigating this so far, I ...