Procedural Mesh slicing only caps one of the meshes

When using the Procedural Mesh slice function, there is an option to add a cap onto the sliced mesh so it doesn’t look hollow but it only caps one of the two halves that you sliced. Is there any way to get it to cap both halves?

idk anything about procedural slicing, but you can fake a cap using a two sided material if you want. It won’t work on every shape, and won’t work if your wanting to do multiple slices on the same mesh. however if you’re just slicing a cube like in beat saber it should work fine.
https://www.artstation.com/artwork/Xlnv0