Unreal Engine Issues

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 ...

Thin Translucent materials opaque with FS lighting mode and Output velocities active

Im not 100% sure this is a combination of settings that "should" work anyway, but need someone to have a look.Thin TranslucencyOutput velocities during base passForward Shading lighting modeProject ...

Layer blending not detecting compilation errors correctly when linked to material functions

This may be more of an error when detecting the input when layer blending is being used (as we've seen in other functions), rather than it necessarily being an error with the compilation of the stan ...

TransformVector WorldToTangent in Material editor seems to form incorrect HLSL

MakeMaterialAttributes and LandscapeLayerBlend produce unexcepted results for WorldPositionOffset

For comparison, this issue doesn't seem to occur when recreating the setup with Set Material Attributes/GetMaterialAttributes. It seems isolated to the Make/Break nodes. ...

Volumetric Clouds do not affect Niagara particles or Translucent materials

Terrain layer weight parameters don't work in material layers

Quick look at code, seems like terrain weight parameters aren't considering MPI association or index. ...

ODSC - Launching a newly created project via UnrealFrontend fails to load some materials and crashes

The same repro steps on 4.26.2 will launch the project successfully. Packaging a project once to create complete ShaderMaps will work around the issue. ...

Changes to Material Instance Parent don't appear to propagate to child instances if the child instance's editor window is open

It looks like this occurs when the grandchild instance window is open. If you close and reopen the Grandchild's window the parameter appears as expected. I've attached a project with the setup step ...

Two-Sided Material option is initially greyed out and inaccessible when creating a Material Instance

When attempting to change the option for Two-Sided Material for a Material Instance, the option is initially greyed out and you cannot change the value. However, if you close out of the Material Ins ...