Mesh transparency

[maen]

Thanks in advance for any help any one give me

My problem is that I have a number of mesh objects I want to view in my program , and I want to make some of them transparent , I tried alot,
any body can tell me how to make part of a mesh or the whole mesh transparent , so I can view through it another mesh inside the previouse one,

Thank you for your help

 

[Menge]

i change the mesh's vertex color and it works great for me.

 

[maen]

How can I do it , and if so does it show a small mesh inside the orginal mesh which I want to make transparent ?

Thank you