Optimisation
- Models taken from CAD packages often contain much more detail
    than is necessary, or possible, to render
  - Models often need to be optimised to run efficiently on the
    target platform
  - Optimisation is usually best done by tools but manual optimisation
    may also be necessary
  - Optimisation typically involves the removal of vertices and/or the
    merging of triangles in more efficient formats (such as Pmeshs)
    for the target platform
  
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