In rhino you draw with nurbs and set the poly count when you convert or save. In max you set the res in preferences. I don't know how you set the size in LW but it's probably the number of steps. In bryce you can select the object. Click on the "E" and a smooth or unsmooth dialog shows up. Grab the slider and drag it up then press smooth to add. You can import a relatively clunky object with low polys and really smooth it out. Iv'e had no trouble with bryce smoothing out lathe objects with ten steps. Conversely you can unsmooth a sphere and make it look like a facted stone.