Hello guys I will show how create a 3dsmax 3d stones model tutorial.
I have used following techniques shown below in this 3ds max tutorial.
[1]-Click on the Sphere button and create a sphere with the following size
Place like me 
[2]-Pick the select and uniform scale button now compress the sphere like me 
[3]-Create more copies and set like this 
[4]-Open open material window and make material like me 
[5]-Set the skylight like this with the following parameter 
[6]-This is my final image 