Chaos Corona Forum
Chaos Corona for Cinema 4D => [C4D] I need help! => Topic started by: Jesse on 2020-11-14, 12:15:12
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Hi Corona-Render Family :)
I have a question regarding Corona Render and window-glass material.
In vray I was used to use glass with a thickness of 5mm.
In postproduction I had a pure refraction channel and a pure reflection channel.
When I do this in Corona there are also reflections in the refraction channel.
If I look at the glass in a flat angle, I sometimes have almost no refraction information in the refraction channel. But almost only reflection. (pls see attached images)
I also have to select Caustics, otherwise I get strange refraction/reflection. Distorted reflections wrong refraction. But this is no problem in terms of noise. I like to take the time to render for pure realism.
Corona Render Forum recommends to use glass without thickness and then select thin(no refraction).
If I do that, I can't get behind the glass in post production. The refraction channel in the multipass is empty.
The only solution I could think of is to set the refractive index to 1.0, so I have no problems with distorted refraction and no more reflections in the refraction channel.
But then it is not 100% realistic.
Can anybody help me out.
1. I really would like to use glass with an refractive index of 1.52 without having reflection on my refraction channel.
2. What can i do to get the information behind the glass if i have selected thin(no refraction) and the refraction channel in the multipass is empty.
Many thanks in advance, Jesse
P.S: i also have the problem that the material ID channel in multipass is empty, although i have assigned a material ID to the glass!