Pokémon Model Ripping Project

[Ocelot33]

You've really made my day, I've been checking here everyday to see if there were new models.

I got a question if anyone could please help:
I use Cinema 4d and can't get the iris textures to appear only inside the area of the eye. I tried with alpha channels and transparency but no luck, they just keep showing over outside as in the inside of the eye.
I see by your renders that you could solve this issue, it would be awesome if anyone could explain this to me. Thanks a lot.