Refraction IOR and Refraction Glossiness

[mervin]

I want to render a PET bottle filled with a gel substance with flakes in it. I use the following material settings:

gel:
Refraction Glossiness 0.8
Refraction IOR 1.55

PET bottle:
Refraction Glossiness 1.0
Refraction IOR 1.57

When I render the gel inside the PET bottle it looks like it has a Refraction Glossiness of 1.0 (flakes are not blurry). When I use an IOR of 1.55 for both materials it looks good. I tried some other combo's but I can't find out when it works and when it doesn't.


left: same IOR (1.55), right: bottle: IOR 1.57, gel IOR 1.55

.3DM: http://www.2shared.com/file/11816048...8/GELTEST.html

Please look into this.

[mervin]

Re: Refraction IOR and Refraction Glossiness

[edited...]

Any1 looked into this? Any workarounds or has any1 found out when it occurs and when it doens't?