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Optimizes the mesh for display.
This operation might take a while but will make the geometry displayed be faster. For example it generates triangle strips out of the triangles. You should use it if you generate a mesh from scratch procedurally and you want to trade better runtime performance against higher load time. Internally it tri-strips your model and optimizes the triangles for vertex cache locality. For imported models you should never call this as the import pipeline already does it for you.