Defect: Hair not rendering correctly with Vray 2.5

Problem

Description:

we're facing an issue where the result of rendering with V-Ray is not showing the hair as expected from the viewport preview. this is happening with 3ds Max 2012 and Ornatrix 3.2.0.0. there are quite some holes in the hair coverage on the body which shouldn't be there.

here's a download link which contains the .max file as well as a rendered frame to illustrate the issue.

https://owncloud.celluloid-vfx.com/index.php/s/5j4IzT4Ap5vUIeG

best,

Holger

Steps to Reproduce:

you can reproduce this by opening the 3ds max scene and just render a frame.

Title:	Hair not rendering correctly with Vray 2.5
Category:	Crash/Critical
Status:	Open
Posted By:	celluloid_vfx ( Celluloid Visual Effects GmbH & Co. KG )
Date Created:	11 May 2015

11 May 2015 #6098
celluloid_vfx	we just realised that you will need a displacement map to be able to render the scene correctly. you can download it from here: https://owncloud.celluloid-vfx.com/index.php/s/YSG5HLsbBczoTXb we actually think by now that the problem is related to this displacement as it renders correctly when switching the displacement off. but it was also rendering correctly with displacement before. to us, this seems a bit random right now but maybe it's a hint for you guys. best, Holger

Summary

Problem