I have lots of projects but I don’t know how to create a good render. I do a “best” render with all the settings and I’ve even tweaked them. My computer’s great so I don’t know why my stuff isn’t matching up to other peoples. How do I get a good background and everything? Also how do I get a bigger resolution image?
Better use external renderers…Vray is my choice. although u can use Z’s render: add lights, use GI and…read Rendering section in FAQ. 
Luck!