Hello guys I will show how create a 3dsmax 3d letter box model tutorial.
I have used following techniques shown below in this 3ds max tutorial.
[1]-Start 3dsmax and choose "Rectangle" with the following size as shown below
Place the recangle like me 
[2]-Convert the rectangle into the editable spline ok 
[3]-Now select the vertexes and apply the fillet 45.54 approx 
[4]-Your spline should like this 
[5]-Open the rendering palette and use the following setting 
[6]-Your object should like this 
[7]-Create one rectangle and place like me 
[8]-Create chamfer cylinder and place like me 
[9]-Create box and cylinder now place like me 
[10]-Switch to the line button and create shape like this 
[11]-Apply the extrude modifier with the amount of 1.0 
[12]-Place the object like this 
[13]-Create box like this 
[14]-Now create shape and select the vertex apply the fillet 6.0 
[15]-Your spline should like this 
[16]-Apply the extrude modifier with the amount of 1.0 
[17]-Your object should like this 
[18]-Set the letter like me 
[19]-This is my materials 
[20]-This is the final image 