No need to get complex :) Just make a primitive sphere - convert to vertex model and try to decimate vertex count by 80%. The result speaks for itself. The functionality I would like, would be to decimate a high-poly model to a low poly model which with subdivision level 3 would approximate the original high-level 3D shape (with some inevitable smoothing of course). But that may be a tall order. Doing decimate by fidelity gives a bit better result, but needs several iterations and then funny yellow polys start appear etc. Cheers, Rune