Comission - CELESTIENE

First of all, the overall appeal of this manipulation is great! The mountains in the background really blends well with the horse's coat and the wings immediately catches the viewers attention. The halo and the highlights on the horse looks stunning too. Your technique is great!

If I had to really criticize something it would be the placing of some of your highlights. I'm assuming you want the halo to be the main source of light, so maybe try focusing the highlight in the head area and create more shadow where you think the light from the halo won't reach. For an example, the wing might cause a shadow somewhere around the haunches of the horse.

Your second source of light is the sun behind the horse, so maybe try showing this by making a bright outline in more places like you've done with the wing.

Generally, maybe try adding more shadow and contrast to the horse. Especially around twilight things tend to be more gloom looking.

All that being said, this piece is truly stunning and what I'm pointing out is minor details! Keep up your good work! <3