Not sure if this has been suggested already, couldn't seem to find an existing post, so just going to throw this out here anyways. So, currently we have an option for 'Marble slab staircase', which for those who haven't already built it just has the floor being marble. In my mind, when I built this, I was thinking the model of the staircase itself would actually be marble, only come to find out it was the same standard wooden staircase. My suggestion is have a staircase model that has a texture resembling that which is used for the marble bridges. Please give your thoughts, ideas, suggestions, comments and perhaps build on this suggestion!