iOR and rough glass

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Fox
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iOR and rough glass

Post by Fox » Sun Oct 06, 2019 8:30 pm

Has anybody noticed in underwater scene, when you have rough glass sphere with low roughness like 0.01 - 0.001, under the water,
when you make that glass sphere to have same ior with water, then glass turns rather dark?
When rough glass is disabled or ior between volumes is different, then all looks good.

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Dade
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Re: iOR and rough glass

Post by Dade » Sun Oct 06, 2019 9:38 pm

You may want to post a test scene, otherwise it is hard to check what is going on :?:
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Fox
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Re: iOR and rough glass

Post by Fox » Sun Oct 06, 2019 10:32 pm

It's the older Blender scene.
Volume named "Cool3" ior 1.326203018904 vs 1.5 with Rough on.
Material named "MiauCool3" Rough on vs off with ior 1.326203018904.
ior vs rough.7z
(2.01 MiB) Downloaded 31 times

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Dade
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Re: iOR and rough glass

Post by Dade » Wed Oct 09, 2019 1:15 pm

Fox wrote:
Sun Oct 06, 2019 10:32 pm
It's the older Blender scene.
Volume named "Cool3" ior 1.326203018904 vs 1.5 with Rough on.
Material named "MiauCool3" Rough on vs off with ior 1.326203018904.

ior vs rough.7z
I have loaded the scene in Blender but I have sincerely not idea of what I'm looking at:

g.jpg

What is it and how it is supposed to look instead :?:
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Fox
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Re: iOR and rough glass

Post by Fox » Wed Oct 09, 2019 4:09 pm

Dade wrote:
Wed Oct 09, 2019 1:15 pm
What is it and how it is supposed to look instead :?:
Maybe it's just very slow.

10 min border render
Clear glass looks faster with different ior's
Clear Glass ior 1.25.png
The rough glass gets brighter with smaller and bigger ior's than exterior ior, but it still looks dull.
Maybe just slow, not bug :roll:
Rough Mix Glass ior 1.32.png

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