MODELLING CONCEPTS

N-Gons.

Any face which has more than 4 edges is an N-gon.

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N-gons can not predictably be triangulated and cause enormous problems in 3D.

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N-gons terminate flow around a model and for the same reasons as triangles, should be avoided.

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There are additional problems with n-gons when trying to distort or warp your geometry,  They  are not predictably divided at render time so unnatural creasing and wrinkling of surfaces will almost always occur.

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N-gons can always be converted to a combination of quads and triangles but you may lose control over your flow by beginning with an N-gon. Planning your topology to avoid them completely is the best strategy

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