The textures for the wall and floor are marbles. There are some inside the texture library but you can always import your own marble textures found on the web,

I put a light panel created by Enko Nyito outside behind the glass blocks. Of course I resized the light panel to cover the entire glass blocks. Pewrsonally I find the sunlight of SH3D is too weak.

I also set the shininessShader in the photo rendering properties from default to glossy.