Can't render black background through glass

[rmaytee]

After hours of trying every setting I can think of, I have been unsuccessful at figuring out this glass issue.

To sum up my needs:
1. black background, so I can replace the background)
2. have reflection saved in the alpha in a rendered png
3. have environment effects apparent in the reflections (floor particularly)

If anyone has a spare moment to download my file, I would love it if someone could take a look and let me know what I'm missing. I have done this may times in the past, but I haven;t had a similar scene pop up for well over a year, so I'm not sure if there is a new setting I need to be aware of, or what.

Here is the scene I have made available.


Or feel free to post suggestions. I swear I have tried everything though.

[Zdravko.Keremidchiev]

You can disable the Reflection/Refraction environment override and add a reflection and refraction render element. Then you can use those two along with the alpha channel in post to add the background that you want.