Ensure ground plane shader "matteForSecondaryRays" attribute in "Maya_VRay_Standard" and "Maya_VRay_Dome_Light" templates is set.

Reflection rays hitting the ground plane will now see the reflection environment including shadows casted onto the ground plan.
This option works perfect in vray for maya 2.4, however in vray for maya 3.0 beta, there is currently an issue with that. The reflection ray hitting the ground plane will see a projected version of the reflection environment. There seems to be no way right now to get back the original behaviour. I reported the change to chaosgroup. They think it is a bug and are on it..

Lets see if I did everything right using sourcetree.