anisotropic metal UV problem

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JoeDDD
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anisotropic metal UV problem

Post by JoeDDD » Fri Jan 25, 2019 5:01 pm

Image
I want to get this result but I cant get the anisotropic shader to work.
I have already unwarped the object but the reflections are still not working right.
ProjectFile.blend
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Thanks!

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B.Y.O.B.
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Re: anisotropic metal UV problem

Post by B.Y.O.B. » Fri Jan 25, 2019 5:09 pm

You need to set different values for U- and V-roughness.
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2019-01-25_18-08-54.png
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JoeDDD
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Re: anisotropic metal UV problem

Post by JoeDDD » Fri Jan 25, 2019 5:17 pm

B.Y.O.B. wrote:
Fri Jan 25, 2019 5:09 pm
You need to set different values for U- and V-roughness.
Thanks but I would like to get the result on the right side of the picture I rendered in cycles.

Picture:Image

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B.Y.O.B.
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Re: anisotropic metal UV problem

Post by B.Y.O.B. » Fri Jan 25, 2019 5:19 pm

LuxCore requires a different UV map, you need something like this:
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aniso.blend
(608.02 KiB) Downloaded 36 times
2019-01-25_18-17-52.png
2019-01-25_18-17-42.png
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JoeDDD
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Re: anisotropic metal UV problem

Post by JoeDDD » Fri Jan 25, 2019 5:36 pm

B.Y.O.B. wrote:
Fri Jan 25, 2019 5:19 pm
LuxCore requires a different UV map, you need something like this:
I tried to use every possible UV unwarping I could but the result still looks very different from the reference image or the image I rendered in cycles.
Image
You can see some weird blocky reflection artifacts and the reflections are not centered.

Here is the same scene I rendered in cycles:
Image

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B.Y.O.B.
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Re: anisotropic metal UV problem

Post by B.Y.O.B. » Fri Jan 25, 2019 6:53 pm

Maybe Dade can tell us more?
I actually don't have much experience with anisotropic materials in LuxCore.
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Fox
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Re: anisotropic metal UV problem

Post by Fox » Fri Jan 25, 2019 7:00 pm

UV texture normal map, or physical mesh displacement should work.
Blender ring wood disp.jpg

JoeDDD
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Re: anisotropic metal UV problem

Post by JoeDDD » Sat Jan 26, 2019 4:47 pm

B.Y.O.B. wrote:
Fri Jan 25, 2019 6:53 pm
Maybe Dade can tell us more?
I actually don't have much experience with anisotropic materials in LuxCore.
Yes I hope he can because I'm working on a project and I'm curently stuck.

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Re: anisotropic metal UV problem

Post by B.Y.O.B. » Sat Jan 26, 2019 5:21 pm

The situation in my example file somewhat improves if I use 4 subdivisions instead of 2:
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2019-01-26_18-19-58.png
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JoeDDD
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Re: anisotropic metal UV problem

Post by JoeDDD » Sun Jan 27, 2019 7:15 pm

B.Y.O.B. wrote:
Sat Jan 26, 2019 5:21 pm
The situation in my example file somewhat improves if I use 4 subdivisions instead of 2:
This is a quick test render from my scene where I tried using a bump map for anisotropic material on the control knob. It looks ok but it could look a lot better if I could use the real anisotropic shader.
Image

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