I need a little help. My brain cant compute this. 
If i create a glass shader and set the alpha to color+alpha i get an alpha but this alpha is much stronger than i would expect. With a refraction IOR of 1.3 its near white.
I tried a lot of things. But nothing does what i would expect.
I would need to create something like that.

If i create a glass shader and set the alpha to color+alpha i get an alpha but this alpha is much stronger than i would expect. With a refraction IOR of 1.3 its near white.
I tried a lot of things. But nothing does what i would expect.
I would need to create something like that.
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