Hi keith, just one more note about this part:

> The model I copied on turbo squid http://www.turbosquid.com/3d-models/3d-model-cartoon-crab/822724
> has only 5,646 polygons and looks very smooth.

That's 5,646 polygons for the "base mesh" - that model was created using a technique called "subdivision surfaces" and the super smooth render that you see is because of additional polygons being added just for the rendering process.

That particular type of modeling method also called "sub-d modeling" is set up like that where you have a coarser control mesh and then a smoothed down result that adds more polygons when it's rendered. It's a different type of model structure than what you will get with a CAD model.

If you wanted to specifically make something with a low polygon count that used that same process you would need to model it in a polygon modeling tool by manipulating cage points, it's a different way to create models than the curve oriented CAD method that MoI is based on.

The models that you build with MoI and export as polygons will not be further refined just at render time by the rendering program, so because of that if you want them to have a smooth looking silhouette you will need to generate them with more polygons in them when you save them out from MoI.

- Michael