Glass shader at loss of details

[Miatpi]

Hello! I’ve noticed something wierd going on with (I guess?) the glass shader. I’ve learned that when I separate a shader into three set at red (1,0,0), green (0,1,0) and blue (0,0,1) respectively, and afterwards add them together (using Add Shader) I should get the same result as with a single shader with a pure white (1,1,1) colour. This works with the diffuse and glossy shader, but when I do that with the glass shader the result lacks highlights and details that is should have:

Rendered with three glass shaders added together:

Rendered with simple glass shader:

(the reason it’s a problem for me is that I need to split up the glass shader that way to give each colour a different IOR. It’s not a deal breaker but I still want those extra highlights if I can )

My blend:
Sample.blend (894.6 KB)

[DNorman]

Ha, this is an interesting observation.

Maybe you could join us in this thread.

Iridescent Glass Shader on Cycles like Octane Glass

Is it possible to make glass like Octane glass in Cycles? I’ve come across a lot of tutorials and tried a lot of shaders, but technically and visually none of them exactly like Octane’e Glass. When I look at the reflections in Octane glass, I can clearly see the purple and turquoise colours. Shall we start a challenge for this? There is an example from Christoph Gromer. https://www.instagram.com/p/CnuTz41tVDs/

I think the add shader method with different glass (or refraction) nodes and shifted IOR falls short because it does not disperse the colours of the light. It just separates them.

One way to get the glass details back would be something like this.

Sample2.blend (103.1 KB)