Right, now I had a bit of a hunch you see, so I pasted this into Paint and inverted the colours, and I was right.
This is just a square room isn't it? When you invert the colours it looks like the candles and the light they give off are part of a texture, on a wall? If you look at Noob's Dorfen, you can tell it isn't square, in any way really. It looks more like a circular auditorium. And the well in the middle, that is supposed to lead down to the balcony and the Soul Chamber I believe, is just a circle with a texture, which would be fine, but the texture doesn't give hte feel that it leads down anywhere.
Then again, like you said. You did it in an hour. It just needs more in it, in the way that parts of the floor can be seen when there is light sources around, look at the 2D version. The candles would be circulating the well in the middle, or at least it looks that way in the MK3 version.