In Vray Next for Rhino it seems that when choosing ‘Edges’ as bump map, it no longer automatically switches the map from ‘Bump Map’ to ‘Bump Texture Channel’ so at first it appeared to me that the feature was broken.
Furthermore, wrapping a material into a Bump material, using ‘Edges’ as bumpmap doesn’t work.
Kindly note that our dev team has been notified of this behavior and they will further investigate it.
Regarding the bump material, I was unable to reproduce the issue. Could you please share a sample scene where this is occurs so we can investigate in detail? If this is alright, please send us an archived copy (V-Ray > Pack Project) to support@chaosgroup.com via email or a file-sharing service of your choice.