Anysotropy structure effect

[arnaud]

Hi Dr Sassi!

I'd like to reproduce this effect:

I'm quite close with this:
https://www.swisstransfer.com/d/94562d4e-8fc5-4029-913e-c803e3de9db8

I'm not so sure about the spiral effect in the anisotropy, maybe there is a better way to do it. Thank you for your guidance.

Cheers,
Arnaud

[arnaud]

Once in context

[Dr. Sassi]

Hi arnaud,

Sorry to make you render the texture, but it is super fast and saves a lot of bandwidth, especially when rendered in 4K of even 8K

Please render this Project as is, perhaps set it to 8K.
CV4_2025_drs_25_TXpm_01.c4d
I have deformed the plane (Taper), projected a material (flat) onto it, created a new UVW file, and then bent it into a disc. Adjust the Noise to get the details you like if you would like to use your setup.

Place this file in a Project folder.
CV4_2025_drs_25_RSas_01.c4d
Place the rendered texture file in a tex folder in the project folder

I have used the "zbrush_HDRI" with a Domelight from the Asset Browser.

Use the timeslider while the RS render view is active, I have animated the lights for a better preview..

There are several ideas on how to produce Anisotropy; this would be my way, which is also surely a result of other sources I have seen over the years.

The key to Anisotropy is a kind of abstract rotation of reflected light. While a texture (gray values) can be used to rotate it, getting exactly your example might take some tweaking.

Enjoy your project

[arnaud]

@Dr-Sassi

Thank you for this very valuable help. Deforming the geo instead of using a texture image is something I didn't even think..
It does a pretty good job and the light deformation appears to be more conform to the reality.

Here is the result I get. Much better.

[Dr. Sassi]

Thank you very much, arnaud.

This looks great! Thank you so much for sharing your results.

My best wishes for your project.