I’ve exported a glb file from Unreal Engine and for the most part it looks great in the sandbox, but one material is showing as two different shades of white/grey.
The meshes are two-sided and the material is 2-sided, any other ideas? I’m new to Babylon so maybe this is something simple I just don’t know about.
This would come from the setup in unreal or its exporter unfortunately 
Could you share the file with us ? We could then look into it and see if there is anything obvious you could ask there.
I’m not sure if this is the right way to do it, but I changed the rendering setting for the material to Realtime Filtering with High Quality and that seemed to do the trick. Hopefully that’s not wrong! I’m still new at this.
It is not wrong but less performant with a better overall quality.
If you can share the file with us (or even just a minimal file that has the same behavior, exported from the same tool) we can take a look at see if there’s another fix 