Is there a way to render with VRay in Houdini???

Almost every AAA renderer except VRay, afaik

Mantra that ships with Houdini is excellent.

This is something I've wanted to see for a long while. Though Mantra is great, it's even greater to have options available to you. I personally can't wait for the Arnold plugin to be released.

While there have been hints of some attempts, from 3 years ago;
http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=20183&highlight&sid=070f5b794fc5c4b168ea6d403978550f [sidefx.com]

Nothing official or artist ready has come out. It seems possible for those who can to roll their own exporters, but for those aren't as capable, are left wanting. Might be a similar case for Vray for Softimage though, where it was said that they put in more resources than it was worth.

http://forums.cgsociety.org/showpost.php?p=7766759&postcount=34 [forums.cgsociety.org]

“ Mantra that ships with Houdini is excellent. ”

It is indeed. At DD I had to ditch Vray and render in Mantra as it couldn't handle the amount of geometry !