Setting up for render element composites for post (photoshop)

[vanderloo]

Can someone point me to a good tutorial for the best way to save render elements as separate channels for photoshop composites in post.
I'm in max 2016 and Vray 3.20.1 and everything I'm finding online is a little dated.
I'd like to utilize the most up to date workflow.
Thanks

[piotrus3333]

linear multiply with unclamped colors for color mapping, save to 16 bit exr with gamma 1.
simple comp is vrayGI + light select (or a couple of those) + reflections (if refractions are affecting all channells in refractive mats - you dont need to add refractions) + selfilumination - shadow + shadow.
that is probably enough to start with.