Converting PLY from ZBrush with ply2vrmesh will not include all polygons in this vrmesh.
Is only the preview mesh included?
what is the reason?
Using PLY format plugin for ZBrush 4R8
http://www.zbrushcentral.com/showthread.php?193288
example PLY and converted vrmesh.
There is no problem loading PLY in Rhino
Hello, busy with V-RayNext?
bump !
I logged the issue in the bug tracking system. As soon as I get an update I’ll let you know.
Thank you.
The following wish implementation has higher priority.
https://forums.chaosgroup.com/forum/v-ray-for-3ds-max-forums/v-ray-for-3ds-max-wishlist/986035
If ZBrush vertex color can be read with OBJ, PLY support of ZBrush is unnecessary.
As Vlado mentioned, we’ll look into it.
The issue is fixed for the next V-Ray 4.02.03 Beta which will be available soon.
Wow! exciting news 
I can not wait to test it!
tested Ply2vrmesh of Next Beta 3.
The problem was solved, but the process is very slow.
Processing data of 3 million polygons takes about 30 minutes.
This will not be usable.
test data
https://drive.google.com/file/d/1L3VXG63Gwlrc3g63ThiqG7RRyxYz-Qen/view?usp=sharing
However, OBJ vertex paint support has higher priority.
https://forums.chaosgroup.com/forum/v-ray-for-3ds-max-forums/v-ray-for-3ds-max-wishlist/986035
