Hello!
As I didn't reach to make a quality wall with Heaven's gate, I decided to change everything.
I wanted to keep the mystical atmosphere, so I chose a church window that I vectored (6 hours) and cut the glasses. I inserted behind a painted sky that I emphasized (colours and contrast-light). I finally added riped curtains, as if they were in an old cathedral (in ruins), and to add a warmer texture (than stones of church wall). I chose darken the whole.
I added some stars (not too much, because it's dawn) and I made an evening star (brighter han other, and twinkling).
I tried to make something harmonious, so I emphasized the characters (light, size, colours, saturation and contrast) to melt they into the BG, but in bringing they out.
Thanks for your advices in the Session Zero that help me to improve this wall!
I hope you like it, and you appreciate the improvements...

Cilou