Wanted to try contour for the first time in V-Ray 6.10…but hey - its not there at all !! As I understand it should be right under volumetric enviroment. Any ideas why its not there ?
Hi, maybe what you’re looking for is called Outlines and can be found in the Settings tab.
The option below Volumetric Environment.
Only in CPU mode.
Hello @kimalbech ,
As @DCHA34 have pointed out you have to look for Outlines (example) if you are using CPU render engine. Please note that for the GPU render engine this feature is not supported.
ahhhh - got it - thank you both 
one of these issues where your brain is locked in one direction, and you can not see whats around you