A fictional breed Darnacon mare, blood bay silver dapple roan with white and black markings. Go to the link below for the full size picture and additional information:

I hope you do not mind the random-ish song choices:
1. Winterspell by Two Steps From Hell
2. Reaching by Audiomachine
3. Blackheart by Two Steps from Hell

3.5 hours, GIMP, tablet

I can't take the credit for her beautiful swirly markings; ArkAngel-L on deviantART designed them for me!