Notes:

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Usually the first draft of the final world does not meet the performance specifications laid out by the Design phase. It is now necessary to optimize the world so that it meets those specifications. There are many different ways a scene can be optimized. Which method and the techniques used are partially dependent upon the target system. For example, a high-end system using a slow link will be optimized differently than a medium-level system on a high-speed network.

The optimization may requires changes to any component in the world. In the most extreme case, a complete redesign of the world may be necessary. Usually the required performance can be achieved with last drastic measures. Reducing image size (pixels and file size), image and model reuse, model polygons, and world layout are frequently sufficient to achieve the desired results.