I need a spherify a poly cube, how can I do that in Maya? I know in 3dmax (spherify), or in Lightwave (spherize) but i dont know for Maya.
use a spherical sculpt deformer
I downloaded the fit morph script which you can find here in the maya modeling mel scripts. It works quite nicely.
what about using "smooth"? if you apply it a few times, you'll end up with a nice spherical object.
It's not a same effect. Then you have to many plygons.