Making this look more realistic?

Basically, here’s what I have so far, it’s a recreation of this image: http://www.mcescher.com/Gallery/recogn-bmp/LW426.jpg


What’s really bothering me is that I can’t seem to get that looking more realistic. It looks pretty fake right now to be honest. How can I make it look better?

I think I have figured this out. Just forget I posted this. :embarrassed: