10 million polys on a print the size of a human (6 feet tall) is probably detail finer than .1mm (smaller than the XY resolution of the nozzle).
I have found that zbrush models reduced to a mere 100k polys still looks very good.
I'm not sure how smart zbrush is about reducing polygons. I recommend this method which is very sophisticated in which polygons it removes, and which it keeps (meshlab is free):
http://www.shapeways.com/blog/archives/226-polygon-count-reduction-with-meshlab.html
I don't know if even meshlab can open a 1G stl but it probably will. It might take 20 minutes though so watch some youtube or something while waiting. Be patient. Once it's loaded don't try to rotate it, just go straight to the poly reduction step.
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Daid 306
I have a new GUI that I'm working on, which works with higher poly models. But 1GB is really pushing it.
Biggest test model I have has 2949120 triangles. And is 150MB. This one loads in the new GUI while it fails in the current release.
However, this new GUI doesn't to GCode preview yet. So I do not know yet if it can handle a resulting GCode from a file this big.
(The engine shouldn't have a huge problem with 10milion polygons, as long as it doesn't run out of memory. But it might take a while to slice the initial step)
Also, if you can "convert" the OBJ to binary-STL by external means, that would really help in loading the file. The OBJ file format take a lot longer to load then binary STL.
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