[REQUEST] Different blocks at the same tile

[KathaiArt]

I loved the mod so far and I thought that would be cool for many builds if the mod would let me place different blocks (verticals too) together.

Ex.: If I'm building a house, and I want the external wall to be cobblestone but the interior wall to be wood

[TriibuNupsik]

This function exists on the mixed slabs branch but it isn't uploaded to modrinth as referenced in #39