Black objects when rendering.

[Zectric]

Hello, I’m trying to render some prisms with a purple background, but they keep ending up like this:

Any way to fix this? Here is my file: https://docs.google.com/file/d/0BxtLreFIVnSWZFJIZUNrUFV6M1E/edit

[Richard_Marklew]

You are Local View mode. Go back to Global View (Numpad /) and then render

[Zectric]

Thanks so much