Alternatives if you need V-Ray 3.6 specifically:
: Powerful GPU + CPU rendering options that utilize all available hardware. Viewport Rendering vray 3.6 for sketchup 2018 google drive
You don't need to risk a shady Google Drive link. Here is the official way to get Vray 3.6 for SketchUp 2018. Alternatives if you need V-Ray 3