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The Okino polygon reduction system is a mechanism that can greatly reduce the number of polygons in one or more 3D objects of a scene without greatly sacrificing object quality. It is a vital polygon optimization tool of the Okino PolyTrans and NuGraf software packages, which is included for free as part of the base level Okino software packages.
If you are a Maya or 3ds Max user and wish to utilize the polygon reduction system, first export out an Okino .bdf file using the special PolyTrans-for-Maya or PolyTrans-for-3dsMax plug-in systems, load that file into the stand-alone PolyTrans or NuGraf programs, perform the reduction, re-save the Okino .bdf file and re-load it into Maya or 3ds Max. There will be no geometry data loss in the process.
If a 3D model has a sufficient number of polygons in it then typical reductions are 80% to 95% while retaining good visual fidelity. The Okino polygon reduction algorithm implementation is based on the quadric error metrics (QEM) technique. This technique tries to retain the quality and appearance of the original model while reducing the overall number of polygons.
The following images show example polygon reduction results. The same applied techniques are outlined in the polygon reduction tutorials.
A Very Quick Overview of the Okino Polygon Reduction Algorithm