I've been wondring how to do a Clay Render with wire , and when i was playing with material , i found a way to do it, and i want to share it with you .
This tutorial will show how to render you current models with a clay material, and how to add wireframe.
1st :
open your 3ds max , import your model or the object you want to render it.
go to : Rendering => Render... or " press F10 " => common => Assign Renderer and do this :
Go to " Mat 1 " and choose " Standard " . make the diffuse in black color since it will be your Wrie color ( ps : you can choose any color you want to use for wire but better choose black because it will looks clear with the Sub-material we choosed before ) .