https://extensions.joomla.org/extension/digi-showcase-virtuemart-categories-expansion-pack/
Digi Showcase - VirtueMart Categories Expansion Pack, by Digigreg - Joomla Extension Directory
By this plugin you can use VirtueMart categories as data source in the Digi Showcase module.
expansion packjoomla extensiondigishowcasevirtuemart