Hello! Currently I'm working on a project, and I would like to liven up the landing/homepage a bit. So I have rendered out a nice looking image in 4K resolution. Now I imagine setting that as a background image in css would make my website quite slow... I'm curious how Twitter manages to have the fantastic full sized background images on its landing page, without slow loading time or blurriness. It would be great if you have any suggestions, please ask if you are confused.