How do I do Anistropic shading?

So how do you do anistropic shading in 2.40?

also there has to be significant speedup with ztransp rendering and anisotropic shading is also planned.

From here:

http://orange.blender.org/blog/hairy-issues

Then an update:

UPDATE: now anisotropic (tangent) shading has been implemented:
http://orange.blender.org/wp-content/themes/orange/images/blog/thumb-hairspec.jpg

So, if you have the very latest CVS, it’s just a matter of using a Tangent Shader.

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I don’t know, I just made a brand new build (05-10-18 06:00am mdt %| ) and I don’t see tangent or anisotropic either. Maybe there’s a switch to turn the feature on somewhere? Didn’t see anything in the commit logs.

I tried adding a radial blend material, mapped to strand, on the eighth channel. But the shader drop downs, either diffuse or specular, didn’t show a Tangent or an Anistropic. Nice feature though. Like to find that. :slight_smile:

how can we do an anistropic shader?