Rhino is a nurbs modeler, and its polygonal modeling tools are very basic and limited. It\'s totally inadeguate for game models. You could try Milkshape3D, which is free (or if not, it has an evaluation period, if I remember correctly). Amapi too is a tool you could try. Personally I suggest the Maya personal learning edition: there is a free demo and the power of Maya is by far superior to the 99% of software packages you can try.
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