@Dr-Sassi Omg!
This is not a normal stuff man 
You have very impressive background. Big respect!!! and you are answering the my questions with humility . Thanks a lot of that!!
Thanks for supporting my work. My stuff is workig on realisim. I can say I am trying to catch realism. You can take a look.
www.olcaykayihan.com.tr/projects
And here it is another work from me
https://olcaykayihan.com.tr/digitalbackground-burosit2
it is a liltte bit old but it still has a valid realism I thing.
I hope one day I can be a Maxonian and we can work together 
I am looking for work oportunuties:)
@Dr-Sassi said in Random color/material node and other random color options:
I can't see if you have done it already; however, if you like to mix up people, for example, they can have their texture and, based on selections, variations in their shirts with random colors perhaps tamed by a Ramp, to allow for some color compositions.
For this question the answer is yes I tried to use on them but it is realy hard to catch realistic colors and I decided to use it on cars. By the way this scene is still work in progress so I can change some of details later maybe .
@Dr-Sassi said in Random color/material node and other random color options:
I have changed the headline of this thread, as gets more colorful by the day. I hope that is OK with you.
Of course no problem what ever you want. The boss is you here
Kind regars