hi i’m rendering with subpixel color mapping=check, but i have warning message - my question: what doing this parameter?
10x and sorry for my stupid question
p.s.when sub.pix.color map=uncheck - no problem!
In older versions this parameter was always ON.
Sub-pixel mapping - this option controls whether color mapping will be applied to the final image pixels, or to the individual sub-pixel samples. In older versions of V-Ray, this option was always assumed to be on, however its default value is now off as this produces more correct renderings, especially if you use the “universal settings” approach.
Best regards,
nikki Candelero
10x
when uncheck i think the results is better 
If you have very bright spots you will want it checked but otherwise unchecked can be fine.
I have a discussion on the general forum about this…
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=16407
I want the bright spots, but I don’t want the long render times. Is there a compromise?