Mountian Fortress

[DanteHR]

Hi everyone, this is my first post here.

I'd love comments and cirticism on this image of a mountain fortress inspired by The Silmarillion (Tolkien 1977).

Its my first attempt at Matte Painting and I'm interested in what I can improve, things like composition, use of colour etc.

Thank you

http://fc01.deviantart.com/fs43/i/2009/122/3/0/Mountain_Fortress_by_DanteHR.jpg