[TEntwistle]

On the reflections, it makes sense that the red outline is the reflection of the forward post, and explains the extra hole that seems to appear on the rear post. The image you referenced seems to demonstrate that well. The area that you outlined in orange may still be a reflection or refraction of one of the other posts that are present. If you notice in the image that you reference, the shadows are at a different angle from the image in the hint. The light source should be more from the rear and side rather than more above. I do not remember much about the physics of light, but changing the angle of the light source should change the way things are reflected and refracted.