How to add a night sky to unity procedural skybox?

I’m using Unity 5 and it’s new procedural skybox. It looks amazing!

In my game, I have a day/night cycle. I can’t find a way to use a night skybox which will slowly appear (blend) to replace the procedural skybox when the night comes.

I know a shader exists to blend between two skyboxes, but it won’t work with the new procedural skybox.

I want to be able to keep the procedural skybox, so I can keep my amaizing sunrise/sunset, but be able to add stars at night.

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Is there a way to replace the “Black” color at night with a standard skybox? An image?
Should I add a huge sphere to my game to act like a skybox and make it transparent on day time?

I really have no idea how to achieve that. There must be a way to change the night sky…

Apparently there is still no solution to this issue. Come on Unity! This was almost 3 years ago and we are still waiting…

@wilmann @JoRouss
You mostly need to simulate stars, so…

Should I add a huge sphere to my game to act like a skybox and make it transparent on day time?
This. Then you can control sphere (or bunch of them) rotation as you want. Or maybe you’ll use a shaded hemisphere? Whatever. Currently you’re simulating stars and clouds DIY style. I think, there is “reasons” not to make complex procedural day-night skybox out-of-the-box solution (you must go and buy it, like the pro skin), so problem (there it is) will be ignored.
Also I find that procedural skybox is unrealistic. I mean, when I look at dusk/night sky IRL, there is obvious deep blue color. In unity, it’s mostly red. I’ve spent hours tweaking it’s parameters, and best what I’ve got is someway realistic pale blue, still reddish.
Throw it and use your own, good that there will be shader graph soon…