I was hoping that it would be a diamond diminution but the Texture pack just makes it look like that they made the portal make you stay at the over world just they made a diamond area the texture is just changing everything. The obsidian they made it look like diamond blocks and the flint they made look like a diamond flint. They just pretty much made a nether portal just it keeps you at the over world and just brings you to a diamond area that they built.
Okay, so here is what I am imagining here:
Diamond the alchemist (me) watching the diamond minecart play in the diamond dimention. DIAMONDCEPTION!!!!!!!!!
Diamond the alchemist (me) watching the diamond minecart play in the diamond dimention. DIAMONDCEPTION!!!!!!!!!