how to make anisotropy like compact disc?

[Mister3d]

How to make anisotropy like a compact disc? I need that this effect sticks to the center, but it flies. I tried to use gradient ramp with radial setting, but it's not working. The left is how I want this, the right shows that it does not follow the center. It's more apparent when changing camera position.

 

EDIT: resolved. Just use uwv map modifier and make spherical unwrap for the object, and use explicit map channel in ward options.

[Justin Hunt]

http://mentalraytips.blogspot.com/

 

Check out the Rainbow effect, sure this is for Mentalray but I am sure you could do it with Vray as well

 

JHV

[Ricardo Eloy]

Just for the record, there was a post about this in the ChaosGroup Forum like a trillion years ago. Take a search there and you'll probably find it. If I'm not wrong, the person achieved real anisotropy using a very, very small displacement map. Looked cool...