SketchUp 2018 was the last version before Trimble introduced significant UI overhauls. Many power users report that 2018 runs faster on older hardware (Windows 7/8/10) than newer versions. Vray 3.6, paired with this, offers a rock-solid rendering experience without the crashes sometimes seen in Vray Next or Vray 5.
Some argue that Vray 3.6 is "abandonware" because Chaos no longer sells it. This is false. Abandonware applies to software whose copyright holder no longer exists or supports it. Chaos Group still holds the copyright and actively prosecutes unauthorized distribution. Downloading from Google Drive is software piracy. vray 3.6 for sketchup 2018 google drive
Use VirusTotal (virustotal.com). Copy the Google Drive URL into VirusTotal. It will scan the shared file with 60+ antivirus engines. If more than 3 engines flag it as malware, do not download. SketchUp 2018 was the last version before Trimble
Chaos offers a 30-day free trial of Vray 6. However, you cannot legally get a trial of Vray 3.6. Once the trial expires, you cannot render. Use VirusTotal (virustotal
Why are people searching for this on Google Drive? Because official downloads for Vray 3.6 have been largely retired. Chaos Group (now Chaos) stops hosting older versions on their main servers, forcing users to scour the internet for backup copies. Google Drive has become the unofficial archive for legacy installers.
If you have a .edu email address, you can get a full educational license for Vray for free. While this is usually for the latest version, educational licenses sometimes include legacy installers.