we installed 3dsmax 2017 today and twice the new 507 and guess what
the strange thing was that i could render preset grass in a fully empty scene, but no way to get it rendered in a recent scene.
strange thing was that billboards worked.
Vray RT rendered the grass.. pretty weird
thanks for the workaround infos! i will try them.
disabling "enable motion blur" on the physical cam solved the problem!!!
THANKS!! i would have never found this solution myself until the next update.