Creating a realistic leather sofa material from scratch can take 20 minutes of tweaking sliders. With a library like 1828-mat-vray, you simply select the "Leather" preset, apply it to your geometry, and adjust the UV mapping. It turns a 20-minute task into a 20-second task.

Clear glass, frosted glass, tinted architectural panes, and pool water.

icon (usually a folder icon) at the bottom left or right-click in the material list and select Import Material