5
$\begingroup$

I must be doing something wrong here, but for some reason in blender 2.72/2.72b the anisotropy shader is acting no different from a glossy shader.

Here is a comparison:
enter image description here

As you can see, there is no difference. I have tried all distributions and tangents and adjusting the rotation to no avail.

Here are my nodes: enter image description here

I have not used any anisotropy since 2.72 came out and just opened up a simple scene I have not worked on for a while and noticed that none of the anisotropy is working as before.
Here is the scene I noticed it on:
enter image description here
The second render is the one I want.

Is anisotropy done differently in 2.72, or is this a bug? I am inclined to think this is not a bug since somebody should have reported it by now, and one of the new things in 2.72 is the new Ashikhmin-Shirley distribution.

$\endgroup$
  • $\begingroup$ For the anisotropy to be noticeable, there has to be some roughness. Is it possible you could upload before/after renders of the file which broke in 2.72? Or the .blend in question? $\endgroup$ – gandalf3 Nov 15 '14 at 23:51
  • $\begingroup$ @gandalf3 I added the renders of the scene I noticed it on, rendered on 2.71 and 2.72. $\endgroup$ – PGmath Nov 16 '14 at 0:18
  • $\begingroup$ possible duplicate of Anisotropic material no longer appears radial? $\endgroup$ – gandalf3 Nov 16 '14 at 0:18
  • $\begingroup$ It looks like the tangent is set differently $\endgroup$ – gandalf3 Nov 16 '14 at 0:19
  • 1
    $\begingroup$ @NoviceInDisguiseGraphics the point is that the 2.72 render is showing no anisotropy, even though it has an anisotropic shader with a very high anisotropy value. $\endgroup$ – PGmath Nov 16 '14 at 2:15
6
$\begingroup$

You need some roughness for the anisotropy to be visible.

enter image description here

As I understand it, anisotropic shading simulates the way light reflects off objects with fine grooves like on CD/DVDs or machined cylindrical objects. Without any roughness, the surface is considered smooth (no grooves).

$\endgroup$
1
$\begingroup$

I found the same problem - anisotropic shaders, didn't work with Blender 2.73 on a project which I started on Blender 2.71. There is some kind of a mismatch whit Blender versions. Shaders worked properly when I deleted anisotropic nodes and added them again.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.