density attribute not working for smoke I'm having problems with the new smoke and fire features for 2.71. I have followed Jonathon Lampels tutorial but it quit working at the part where you put in the attribute node with an attribute of "density". Any idea why it's not working? I also tried the "fire" attribute as well, with no luck.

Here is without connecting the attribute node.



and here it is with it connected.



Thanks in advance!
Make sure your smoke has been simulated a bit before you render it.

You can quickly simulate it by playing the animation (AltA), or you can cache it more permanently by baking it (press Bake in Properties > Physics > domain settings > Smoke Cache).

Once you have done that, you should be able to see the smoke in the viewport and the render.