there are some strange lines going on that don't fit in. left lower corner there's a strange straight line. Right lower corner another line and a black splash. Left upper corner another line and black fill.
Does look like some rendering artifacts mapbc. I like this image, got really good reflections although I am having a hard time with the depth. Are those gold blobs supposed to be in the water or floating above or somewhere inbetween. They look inbetween. I would add more reflectivity to the flat gold pieces, right now it looks like plastic.