Double Side Render with Arch Shader

[Falam]

I like, actually love the Arch Shader, too much so One thing that I've spent the last two days trying to solve, using the double sided shader which didn't work, I also played around with some of the matrix material nodes, which was more of 'playbox' experience then anything practical. I want to render as you see in my beautiful pipe, which has a eroded hole, the inside of the pipe without modelling it ?

[caledonian_tartan]

what if you further subdivide your model?
can you show a wireframe?
is there enough light in the scene or just a reflection map?

[Falam]

what if you further subdivide your model?
can you show a wireframe?
is there enough light in the scene or just a reflection map?

There are enough lights, the object is reflecting the environment & map.