Cool model, tho a crit here :
The golden coins, in the photo it looks like they are extruded from the machine, while on your model they look like they are placed seperately.
Ohh, and could you find a more ugly carpet ?? hehe - I know this is just my preference :-p I think it match the age of the object tho 
I can see you struggle a bit with Final Gathering, and heres a tip:
If your scene size is 100 units, then try these numbers:
Min Radius : 100
Max Radius : 10
the formula is:
Min Radius = Scene Size In Units
Max Radius = Min Radius/10
Then you can use very few Final Gather Rays like 50, 100 or so, result = much lower rendering times.
[B]I usually use this approach:[/I]
Create my Scene
Create a Polycube
Scale my polygon cube so the scene is inside the cube
Look at the size of the of the cube, and read the largest Scale
Enter that scale in the Final Gather Min Radius
Divide Min Radius with 10 and enter the number in Max Raidus.
Delete the Polygon Cube.
Enter 50 FG rays
Render.
Maybe turn up the FG rays in small increments like 50, 75,100 etc.
untill I get a good result.
Good luck and keep up
Carsten Lind
Senior 3D Artist,
Maya Software Manager & Maya Instructor
LEGO Systems A/S
