Looking good. Overall the stairs look very good. The part that is off just a little is the shadows in the middle. I know it is because of the column beside those stairs, but it's not quite right. The eye doesn't follow the progression of getting darker as you go down. Specifically, the stair shadow I circled in red should be the same darkness as the other stairs near it, and the opposite column shadow circled in green shouldn't be there. At least that's what it looks like to me.