What is causing the change in refraction with this glass?

Asked Aug 04 '20 at 17:52

Active Aug 04 '20 at 17:52

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I'm working on a render of a wine glass. I'm feeling pretty good about everything so far, but I can't seem to figure out how to adjust the geometry or material settings to solve the hard change in refraction that starts halfway up the glass.

I looked into some common issues with glass — adjusting maximum light paths, edge split instead of subsurf modifiers. And they helped quite a bit with the wine itself, but the glass remains befuddling.

Glass settings are simply: Glass BSDF, Beckmann, 0 Roughness, 1.45 IOR.

Here are a few photos. The render. The object. And an edit mode screenshot with the edge selected.

asked Aug 04 '20 at 17:52

Kyle Billings

Are you using any modifiers currently on it? – Nate_Sycro27 Aug 04 '20 at 17:58
Just a blind guess - make sure normals are correct https://blender.stackexchange.com/q/165080/78972 – jachym michal Aug 04 '20 at 18:14
@Nate_Sycro27 nope - no modifiers! – Kyle Billings Aug 04 '20 at 18:44
@JachymMichal normals look correct. always a good blind guess though. :) – Kyle Billings Aug 04 '20 at 18:49
Did you remember to downscale the liquid a tiny bit to not having it intersect with the glass mesh? – sorenfroststaal Aug 04 '20 at 19:23
@sorenfroststaal yup! the issue i'm working on is the slight change in refraction that happens on the glass itself. it's most visible where the white reflections on the left and right of the glass get cut off over the wine. – Kyle Billings Aug 04 '20 at 20:16

What is causing the change in refraction with this glass?

0 Answers0