DeoVR player can also do chroma keying. There are quite a few green screen videos on the SLR website that are not pre-keyed (without an alpha channel generated in postptoduction).
DeoVR - support for Czech AR (CzechVR new passthrough vids ) ?
https://www.sexlikereal.com/scenes/2017-space-orgasm-pov-passthrough-31938
https://www.sexlikereal.com/scenes/erotic-massage-with-lya-cutie-passthrough-38749
https://www.sexlikereal.com/scenes/returning-the-favor-with-sladyen-skaya-passthrough-38689
https://www.sexlikereal.com/scenes/returning-the-favor-with-simon-kitty-passthrough-38167
doublevr This is such a great thing to hear. Czech VR's quality, plus passthrough, plus your scripting solutions (please get these scripted ASAP if you want me to throw money at you lol) - this is a match made in heaven 
I think many of us will be happy if they make a proper go of passthrough and you get this deal done. Best of luck with it!
Franky68 only that one https://www.sexlikereal.com/studios/czechar?from=autocomplete
No idea why they keep their customers away from the best experience
i can only imagine what czech could create with this! holy shit! what a time to be alive in!
chanser It seems they have added a few CzVR videos over the past days, but only those that were available for free anyway.
Its a pity tho, would love them to join SLR...what is the czechAR release schedule? They only have one video and that came out like 2 weeks ago. If it's not a weekly thing not sure it's even worth it to have it up here.
2 months later
Yes, its a pity - seems that they dont upload any more videos. 
Franky68 It seems they only ever upload those videos that you can access for free anyway, which includes their first AR scene (but only the first).
boboweb Just as an FYI, you still are able to watch these videos via passthrough with DeoVR. You just have to play around with the PT settings a bit. It's not as good as alpha PT but it works.