reyRenderBuckets – This script will display and enable maximum numbers of available cores from your machines or use minimum Vray Render Buckets you prefer. Hit play button below to see how it works:
Just drag and drop to your 3dsMax viewport.
This script is tested from Vray for 3dsMax 2014-2016 it should work with most latest version. Please note I no longer update this script thus use it without warranty. Give it a try in the download link below: