I wanted to try making a unicorn like those in old tapestries--long neck, long horn, a bit more deerlike. So this one has medieval proportions. I imagine he employs that horn like a lance.
The background is from a photograph courtesy of my dear friend Audrey Lockwood (who, it should be noted, is a better photographer than me, as we spent a weekend at the exact same places taking the exact same pictures, but hers turned out better
What I found to be the chief difficulty: a white animal in a green forest.