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This is the Edge Auditorium in Melbourne's Federation Square.
I had another shot with just the chairs and a diagonal which I was going to enter, but chose this. The alternate entry can be seen in the Applied comments folder.
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You got several good patterns in this. The color and lighting are good. I might have chosen one of the patterns and concentrated on it. In this the great diagonal of the chairs and steps would have worked very well on its own.
Yellowish tint of the photo makes it look like an old snapshot. Composition seems lacking to me. mabye you should have brought the bottom edge of the first row all the way down to the bottom of the image? Not sure but it just doesn't sit right with me.