Nice atmosphere but if that carpeted ground is supposed to be straight and flat, then you've postition the vanishing point for the perspective wrongly. Check out this quick edit I made, I've pointed out some things:
Lines which are parallel don't meet at one common vanishing point, when they should do.
Horizon is above the mountain tops. In my edit, the horizon would be a lot lower to show the height of the mountains.
Columns edges should be curved in relation to the perspective.
The vanishing point would be underneath the archway from the view point, thus you should be able to see the underside of it.
I also quickly gave you my idea of how the shading should be. If there are lights inside the building itself, then you could add some highlights to where I shaded, but still keeping the edge of the shade closest toward the forward direction, where the moon's light is coming from. Hope that helps.
I thought it was off too. I suspect the architecture being too clunky. It overpowers the scene, particulatly the diameter of the colummns. Properly scaled using the pediment as a source the colummns should be a third thinner +- and proportionally anchored, too small now. In conclusion great art and scene with messed up colummns.
It seems a bit off to me, some parts look very subtle and light and others look very bold (the dress), but it is a very nice concept and I think that it deserves a 4 rating at least.
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