The skys lighting is not the same as whats on the mountains, they should match more closely to mesh together better.I understand that If they are in a valley of some type they would be in a shaded area,but the peaks on the mountains should still be getting lit the same as the sky and clouds. The mountains seem to be very low rez as well making them seem smaller.They need higher rez with more real looking textures. The mist/fog needs help, as well as the leaves on the trees. Composition wise, the pic doesnt follow the golden rule.It seems real busy, with no flow for the eye to follow. The dress is real un-natural looking(most at the hip area). The feathers on the wings on the horse also look far too large,maybe make them smaller and more to scale in relation. No color theory, most of the colors used are not "helping" one another.

I eat babies.