Looking for polished concete material capable of being rendered and printed at A3

Just as the title says, I’m looking for a concrete material (polished if possible) for my scene. I’ve attached a picture of the current situation I’m in. As you can see, the floor just isn’t photo realistic which is my end goal. I wouldn’t have cared usually if it was only for the computer, but I have to print this one out at A3, possibly even bigger.

(I lowered the image quality for upload purposes, but the concrete material on the floor looks identical)

Any help is appreciated,
Kind Regards, Paul


Thankyou :slight_smile: