Set the Skies Ablaze

I like this one. It's one of my first major attempts at blending backgrounds, but I think it came out OK. I'd love thoughts on the blending, though. Or on improving lighting, since I don't like the lighting in this.

Stock:

Horse: ~venomxbaby [link]
BG: ~Antithisis-Stock [link]
Sky: ~EssenceOfPerception [link]