Intro to Mesh Economy
Introduce the fact that meshes have a direct impact on performence.
Highlight the fact that at this point, the student should be mostly concerned with "making art" and not getting exceedingly hung up on optimization and performence, but that we're goign to introduce the topic now.
It takes horse power to render anything in a computer, and games need to do it a lot.
The long and the short is - meshes have a concept of "mesh economy", in that we only want to devote the required number of resources to depict some shape.
This is a loose and subjective concept, but the key insight is that unless the geometry serves a purpose, get rid of it.
And if it does serve a purpose, it better be a good one.
Some examples:
Non silluhette defining edges polygons.
Non shading defining polygons.
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