Do I still need to add a gamma correct node to vray material colors?
when You´re at Maya 2015 - yes…
in 2016 no extra gamma things to do…
I’m still using 2014 with Vray 3.3 so I will take it as yes I have to.
yes, for 2014 it´s the same.
You need to correct the color slots too.
Here is a very nice helper for that theme.
https://www.creativecrash.com/maya/script/jjj\_gammatools