Hello everyone! Long time no see.
Can you help me with this problem, please?
The goal is to render this hourglass with the specular but also transparent background.

Edit: I got the wrong file first. See 2nd upload.
It should look like the one with black bg.

I have tried render passes, but they will also come with a black background instead of transparent. Is there any other way? I was thinking of chroma-keying it as a last resort but I can't figure out what program to use for it.