Steampunk Arch's

As my environment won't also be just steam punk will have a Victorian era feel to it as well. So therefore I have been looking at archways which in the Victorian era they like to do in brick form and iron form. below are some examples of what I'm hoping to do.

Above is the Arch's in Maya showing there basic typology and texturing this is one of the arch is is made of marble the other is made of brick I wanted to add some variation into the environment not just copying and pasting the same arch but giving the environment is some variation.

above are the archways in unity.