sorry for posting this cuz i find my answer from here.

https://docs.chaos.com/display/VMAX/VRayHairInfoTex+Setup

i cant delete my post. you can delete it. thanks

Hi Jeordanis

Thanks for your replying and guidance and I'm glad that i'm using Ornatrix becuz of your nice support.

i have another question about Merging or texturing.

i have 4 different hair objects on my character which i've created by Ornatrix in 3ds max. i have to assign gradient material to all of them by one gradient to look a gradient white to blond (Vray). i attached 2 pic to show you what i want.

pic1: 4 different hairs created by ornatrix

pic2: what i want to be (texture)

also i need to use vrayhairnextmtl.

thanks again.

Thank you so much Jeordanis. I don't know why this simple idea didn't come to my mind . It worked nice.