Texture3D stays black no matter what?

Hi,

I have been trying for a while to get 3d Textures to work, but without success. I tried this code:
http://forum.unity3d.com/threads/148605-Unity-4-3D-Textures-(Volumes)
and this:
Unity - Manual: 3D textures but none of them worked, then I found this thread: http://forum.unity3d.com/threads/164556-Texture-3D-Problems and it seems they have the same problem as I do but no solution either. I did not want to revive a dead thread so I created this question.

My graphics card is a GeForce GTX 570 and I use the free edition of Unity 4 (4.3.2f1) and I do not get any error message.

greetings,
FTC

Solved in the forums after it was burried here.

For anyone searching for this: 3D Textures are a Pro Only feature.
http://forum.unity3d.com/threads/222636-Texture3D-stays-black-no-matter-what

greetings