"This article needs to stay and grow.  In my opinion it should not be merged with ""Rendering"" because it is a seperate concept that can be acheived with or without rendering.  A Virtual Model can be done in many ways: diagram in UML, 2D sketch, or as a mathematical model without 3D rendering.  These avenues need to be explored further, and the acticle expanded - perhaps by myself when I get a few minutes -)

 

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