/3/ - 3DCG

hey anons, i got bored of the coffee tutorial because my liquid keeps not render correctly. I decided to try making something on my own though, texturing the label and making a metal material were pretty simple. How do I get my can to be reflective in my render though? I keep having issues with renders so i'd like to learn. I put on the Screen Space Reflections thing and its metallic in my preview but not in my render. Also I made some grass (the bottom of the can sucks) to add a little something to the environment, how do I add something to the background so its not a patch of grass in the void?