Procedural sky of Unity : How to also illuminate the night ?

Hi everybody,

Here is the problem I'm facing : I'm building a day / night cycle using the procedural sky of Unity. Everything is fine exect when the directional light is on the horizon and the sun goes beyond it :The sky is then full black and doesn't react at all to the light anymore.

I have tried to use two opposite directional ( sun + moon ) and it works barely because when the scene swap from one to the other, the change is brutal and really noticeable in the sky.

So my question is : is it possible to only use 1 source of sky lighting , but also illuminate lightly the night when it goes beyond the horizon ?

Thanks in advance for any enlightment on the subject.