Hi
Any trick to generate randomly the Material ID?
Not sure what you mean. If I add a Material ID pass then each material has its own color. Is that what you mean?
yes that’s it
Hi,
I did some material duplicate and then change it setting, so some material ID’s are in same color in multipass.
How can I change the Material ID colors…?
OR any way to reset all material color IDs…?
Thanks
…
Open up the material → Advanced tab → Material ID.
As for randomizing these values… I think you’ll have to edit each material by hand or something 
For seeds and other things, you can enter “x+rnd(100)” or something similar to get a random value.