Exterior Moonlight scene on Maya 2018


Hello everyone,

I’m trying to light my scene on Maya 2018 using Arnold renderer for my final Project at school
and I’m kind of stuck right now because of my lack of Experience in this type of exercice.
I know what type of atmosphere I want to obtain but I don’t know how to reach something similar.

Here the reference image from Overwatch Animated Short | “Dragons” :

and here is what I’ve got so far…

So right now I just have a Aiskydome with a dark blue purplish color and that’s all…
I am trying to add a Directionnal light to imitate the moon rays but it doesn’t render at all.

Can you eventually help me analyse the Overwatch image to find what type of Lights they used ?

Thank you in advance.