Distorted iris reflection in cornea when rendering eye

Distorted iris reflection in cornea when rendering eye

beyondthephylum
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Distorted iris reflection in cornea when rendering eye

beyondthephylum
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Trying to recreate the dome like effect eyes have with the iris and cornea as two separate meshes. Even with that, it looks like the iris is being stretched out around the cornea. It looks semi normal from the front, but I'm worried everything I'm seeing in the cornea is being distorted.

 

Why does this happen?

 

cornea_ref_issue.jpgcornea_ref_issue2.jpgcornea_ref_issue3.jpg

ss.png

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Message 2 of 13

lee_griggs
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Autodesk

What specular_IOR value are you using? What does the shader look like?

Lee Griggs
Arnold rendering specialist
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Message 3 of 13

beyondthephylum
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spec IOR is set at 1.360

 

here's my hypershade

 

ty for the help

hypershade.png

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Message 4 of 13

beyondthephylum
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settings1.png

 

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Message 5 of 13

lee_griggs
Autodesk
Autodesk

Are the normals ok? Are you able to share a simple scene?

Lee Griggs
Arnold rendering specialist
AUTODESK
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Message 6 of 13

beyondthephylum
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What exactly would you need? I have it set up as a project

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Message 7 of 13

beyondthephylum
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normals.png

face normals seem ok

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Message 8 of 13

lee_griggs
Autodesk
Autodesk

>What exactly would you need? I have it set up as a project

 

You could File -> Archive the scene or strip it down to just the eyeball and texture that show the issue.

Lee Griggs
Arnold rendering specialist
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Message 9 of 13

beyondthephylum
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Stripped down and as an archive it still exceeds the maximum file size allowed for upload, is there another way for you to get it?

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Message 10 of 13

lee_griggs
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Autodesk

You could upload it somewhere else and post the link here.

Lee Griggs
Arnold rendering specialist
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Message 11 of 13

beyondthephylum
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nice I didn't know if it was okay or not to use outside links on the forum

 

here's the file

 

https://drive.proton.me/urls/K5ERHPQDZM#K7Q7ccfi7bxl

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Message 12 of 13

lee_griggs
Autodesk
Autodesk

The shading looks right. I get a similar effect with the Emily asset from this angle. Changing the specular_ior reduces the effect but then it isn't physically accurate.

 

lee_griggs_0-1719920371638.png

 

I thought it looked odd, but after googling 'eyeball profile', maybe it's not as strange as it first seems. For example this photo:

lee_griggs_0-1719920598810.jpeg

 

 

 

Lee Griggs
Arnold rendering specialist
AUTODESK
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Message 13 of 13

beyondthephylum
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Participant

I feel like it depends on the angle; when I've looked at someone's eye from the side, I've seen a bit of a dome effect. Looking at those examples, it really does look like there's some type of distortion going on.


Maybe it wasn't as big of an issue as I thought..... I still want to experiment with adding extra layers to it to see if it creates a better effect.

 

 

I've been using images from this photographer as reference

https://www.surenmanvelyan.com/eyes/your-beautiful-eyes/

beyondthephylum_0-1720110383493.jpeg