Hi Shivu,
Indeed it is possible to have more than one plot in a graph3D. Maybe this could be a solution, you are right.
But have a look to the comment from Drohacek. What he proposed work perfectly. I think this must be kept in mind, it might be very usefull.
Anyway thanks for your help (I'm sorry that I cannot help you with the question you posted in the forum)
Bye