One of the most impactful additions in version 5.1 is Chaos Cosmos, a free online library of over 2,000 render-ready 3D assets.
: A real-time "design companion" that provides a live, rasterized view of the model as you work. It is intended for scouting camera angles, testing lighting, and even exporting quick animations or 360-degree panoramas. Vray 5.1 Sketchup Pro 2021
: Version 5.1 added support for screen-space reflections, triplanar mapping, and better handling of transparent materials. One of the most impactful additions in version 5