Achieving Stretched Reflection in Redshift

RJMerritt

Hiya, im trying to achieve a realistic reflection in Redshift. Im still a learning 3D artist, but help would be appreciated!

I have been trying to figure out if the curvature of this mesh is the culprit, or if its a specific IOR value I need from a specific metal. But most values I plugin dont seem to be getting me what I need. I have attached a couple images. The first image is the reflections I need to replicate. The second one is my render. Its like my render is perfectly bouncing light, which gives us nearly a mirror. Where-as in the correct reflection im getting skewed/stretched reflections.

Any ideas?

REF


MINE

Obscura

Its called anisotropic reflections. I don't know if you can do that in Redshift though.

RJMerritt

Obscura said:

Its called anisotropic reflections. I don't know if you can do that in Redshift though.

Yeah I had a feeling it was something simple like that. They have a Anisotropy slider in the material luckily! So thank you very much for that. It definitely looks much better. But its still a bit off. Im getting the stretch, but not in the spherical fasion in the reference image. Any other ideas?

RJMerritt

I actually figured out why. I didnt model the inner hole in the center of the disc. Once I did that, the reflection became more spherical. Thanks for your help!

rollin

Do you understand what anisotropic reflections are and how you can and have to control them to do what you want? 

RJMerritt

rollin said:

Do you understand what anisotropic reflections are and how you can and have to control them to do what you want? 

I only just learned about them. I did go and look up some definitions so that I could learn the fundamentals of what it is. But I do know it helps define the roughness of the surface. I would absolutely love any further information about it.

rollin

You're looking for something like this
http://wiki.polycount.com/wiki/Anisotropic_map
You need to define in which direction the anisotropic effect works. In reality it is some kind of roughness but with a directional structure or flow.. That's why it's also sometimes called flow map. A flow map can be used for various tasks though. Like for a river water flow effect, etc. 

RJMerritt

rollin said:

You're looking for something like this
http://wiki.polycount.com/wiki/Anisotropic_map
You need to define in which direction the anisotropic effect works. In reality it is some kind of roughness but with a directional structure or flow.. That's why it's also sometimes called flow map. A flow map can be used for various tasks though. Like for a river water flow effect, etc. 

Very useful information. Thank you!